diff --git a/Pipfile.lock b/Pipfile.lock
index d3a660f7..cccc5ec5 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -23,14 +23,15 @@
     "default": {
         "apispec": {
             "extras": [
+                "validation",
                 "yaml"
             ],
             "hashes": [
-                "sha256:aaded4ae451752c58b70e579923d8db7daf0b71f62def8c8fe7a2a52bd7c06a2",
-                "sha256:f49c49e0dee3fa545462d4536856458aae61b972727b3c32eabc7d6db8c074f8"
+                "sha256:6613dbc39f41cd58942a697f11c8762ba18422bd173fe0bdfc1535b83d3f84f0",
+                "sha256:79029486d36a0d7f3c659dbf6ae50a91fbed0c22dcd5376f592e076c130bc7f9"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==4.4.1"
+            "version": "==4.7.1"
         },
         "apispec-webframeworks": {
             "hashes": [
@@ -53,9 +54,32 @@
                 "sha256:02a409bd2cb193b20d9eb015ca31400bd3e1721ec5d702e1b96de54608ff5a8f",
                 "sha256:d39c3afebb59ec865fb1247dfd951d7090c159ab0cf3e4291e0869d3be33776c"
             ],
-            "markers": "python_version >= '3.6' and python_version < '4.0'",
+            "markers": "python_version >= '3.6' and python_version < '4'",
             "version": "==0.1.4"
         },
+        "certifi": {
+            "hashes": [
+                "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee",
+                "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"
+            ],
+            "version": "==2021.5.30"
+        },
+        "chardet": {
+            "hashes": [
+                "sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa",
+                "sha256:f864054d66fd9118f2e67044ac8981a54775ec5b67aed0441892edb553d21da5"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==4.0.0"
+        },
+        "charset-normalizer": {
+            "hashes": [
+                "sha256:88fce3fa5b1a84fdcb3f603d889f723d1dd89b26059d0123ca435570e848d5e1",
+                "sha256:c46c3ace2d744cfbdebceaa3c19ae691f53ae621b39fd7570f59d14fb7f2fd12"
+            ],
+            "markers": "python_version >= '3'",
+            "version": "==2.0.3"
+        },
         "click": {
             "hashes": [
                 "sha256:a3747c864f8e400a3664f5f4fd6dae11b4605bf6b727dae7b6f22ba9bd0a194a",
@@ -127,7 +151,7 @@
                 "sha256:f0b278ce10936db1a37e6954e15a3730bea96a0997c26d7fee88e6c396c2086d",
                 "sha256:f11642dddbb0253cc8853254301b51390ba0081750a8ac03f20ea8103f0c56b6"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4.0'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
             "version": "==5.5"
         },
         "expiringdict": {
@@ -160,6 +184,14 @@
             "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.18.2"
         },
+        "idna": {
+            "hashes": [
+                "sha256:14475042e284991034cb48e06f6851428fb14c4dc953acd9be9a5e95c7b6dd7a",
+                "sha256:467fbad99067910785144ce333826c71fb0e63a425657295239737f7ecd125f3"
+            ],
+            "markers": "python_version >= '3'",
+            "version": "==3.2"
+        },
         "ifaddr": {
             "hashes": [
                 "sha256:1f9e8a6ca6f16db5a37d3356f07b6e52344f6f9f7e806d618537731669eb1a94",
@@ -169,11 +201,11 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:8c501196e49fb9df5df43833bdb1e4328f64847763ec8a50703148b73784d581",
-                "sha256:d7eb1dea6d6a6086f8be21784cc9e3bcfa55872b52309bc5fad53a8ea444465d"
+                "sha256:079ada16b7fc30dfbb5d13399a5113110dab1aa7c2bc62f66af75f0b717c8cac",
+                "sha256:9f55f560e116f8643ecf2922d9cd3e1c7e8d52e683178fecd9d08f6aa357e11e"
             ],
             "markers": "python_version < '3.8'",
-            "version": "==4.0.1"
+            "version": "==4.6.1"
         },
         "iniconfig": {
             "hashes": [
@@ -183,6 +215,13 @@
             ],
             "version": "==1.1.1"
         },
+        "isodate": {
+            "hashes": [
+                "sha256:2e364a3d5759479cdb2d37cce6b9376ea504db2ff90252a2e5b7cc89cc9ff2d8",
+                "sha256:aa4d33c06640f5352aca96e4b81afd8ab3b47337cc12089822d6f322ac772c81"
+            ],
+            "version": "==0.6.0"
+        },
         "itsdangerous": {
             "hashes": [
                 "sha256:321b033d07f2a4136d3ec762eac9f16a10ccd60f53c0c91af90217ace7ba1f19",
@@ -199,12 +238,19 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==2.11.3"
         },
+        "jsonschema": {
+            "hashes": [
+                "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163",
+                "sha256:c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a"
+            ],
+            "version": "==3.2.0"
+        },
         "labthings": {
             "hashes": [
                 "sha256:4f286ea585e596aeb67a02d5bd822b2c89828693026085829e15e415a2d2d287",
                 "sha256:970bb6a81f0e007b55e575e6eafe6bba10974d671f2767b91631f001ff53cf0e"
             ],
-            "markers": "python_version >= '3.6' and python_version < '4.0'",
+            "markers": "python_version >= '3.6' and python_version < '4'",
             "version": "==1.2.4"
         },
         "markupsafe": {
@@ -250,74 +296,94 @@
         },
         "marshmallow": {
             "hashes": [
-                "sha256:8050475b70470cc58f4441ee92375db611792ba39ca1ad41d39cad193ea9e040",
-                "sha256:b45cde981d1835145257b4a3c5cb7b80786dcf5f50dd2990749a50c16cb48e01"
+                "sha256:77368dfedad93c3a041cbbdbce0b33fac1d8608c9e2e2288408a43ce3493d2ff",
+                "sha256:d4090ca9a36cd129126ad8b10c3982c47d4644a6e3ccb20534b512badce95f35"
             ],
             "markers": "python_version >= '3.5'",
-            "version": "==3.12.1"
+            "version": "==3.12.2"
         },
         "numpy": {
             "hashes": [
-                "sha256:1676b0a292dd3c99e49305a16d7a9f42a4ab60ec522eac0d3dd20cdf362ac010",
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-                "sha256:43909c8bb289c382170e0282158a38cf306a8ad2ff6dfadc447e90f9961bef43",
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-                "sha256:55b745fca0a5ab738647d0e4db099bd0a23279c32b31a783ad2ccea729e632df",
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             ],
             "markers": "python_version >= '3.7'",
-            "version": "==1.20.3"
+            "version": "==1.21.1"
+        },
+        "openapi-schema-validator": {
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+            "version": "==0.1.5"
+        },
+        "openapi-spec-validator": {
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+                "sha256:ebfeaff7e0bb1c293008a49b2b2c033a7cec3805006a8284fa1a44ad8c30446b",
+                "sha256:ecd84834f58daf94d3a4874a11997180380ef9af11b1fd5f81dbb8599b3c3446",
+                "sha256:f1082f4f15a681b435686ed3fc0232128a222fed6792a47fae5cf081eb751ccf",
+                "sha256:fc9fa0fa88423c0e74db52fe13939aa506789f924a2a879e31f1d415e39a0db2",
+                "sha256:fd0f0629e27d97eec2f51500afbe0845876fdcd89d412035f4d7beb618c51066",
+                "sha256:ff4de00d4f19d622561dee58a5121045ca265df3665751d14433149bbd748f55"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==4.5.1.48"
+            "version": "==4.5.3.56"
         },
         "openflexure-microscope-server": {
             "editable": true,
@@ -325,11 +391,11 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5",
-                "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"
+                "sha256:7dc96269f53a4ccec5c0670940a4281106dd0bb343f47b7471f779df49c2fbe7",
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-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.9"
+            "markers": "python_version >= '3.6'",
+            "version": "==21.0"
         },
         "picamerax": {
             "hashes": [
@@ -356,6 +422,7 @@
                 "sha256:25930fadde8019f374400f7986e8404c8b781ce519da27792cbe46eabec00c4d",
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                 "sha256:431b15cffbf949e89df2f7b48528be18b78bfa5177cb3036284a5508159492b5",
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                 "sha256:612cfda94e9c8346f239bf1a4b082fdd5c8143cf82d685ba2dba76e7adeeb233",
@@ -390,6 +457,16 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.13.1"
         },
+        "prance": {
+            "extras": [
+                "osv"
+            ],
+            "hashes": [
+                "sha256:03374b020a4f643c71fc941bb7d1e4852331732714b4b6ebbbd53dd5f75adacf",
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+            "version": "==0.21.2"
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@@ -398,6 +475,7 @@
                 "sha256:21231ef1c1a89728e29b98a885b8e0a8e00d09018f6da5cdc1f43f988471a995",
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                 "sha256:70387772f84fa5c3bb6a106915a2445e20ac8f9821c5914d7cbde148f4d7ff73",
+                "sha256:7d5e1be385287e2334f708ec261b8ee364ac2bcb07eadcbd7a254f9cd476b65f",
                 "sha256:891e24ec41be15a99c00b0f3a378d3d439876fe18793f874a4f8e796fec77458",
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                 "sha256:b560f5cd86cf8df7bcd258a851ca1ad98f0d5b8b98748e877a0aec4e9032b465",
@@ -425,6 +503,34 @@
             "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
+        "pyrsistent": {
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+                "sha256:a0c772d791c38bbc77be659af29bb14c38ced151433592e326361610250c605b",
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+                "sha256:c1a9ff320fa699337e05edcaae79ef8c2880b52720bc031b219e5b5008ebbdef",
+                "sha256:cd3caef37a415fd0dae6148a1b6957a8c5f275a62cca02e18474608cb263640c",
+                "sha256:d5ec194c9c573aafaceebf05fc400656722793dac57f254cd4741f3c27ae57b4",
+                "sha256:da6e5e818d18459fa46fac0a4a4e543507fe1110e808101277c5a2b5bab0cd2d",
+                "sha256:e79d94ca58fcafef6395f6352383fa1a76922268fa02caa2272fff501c2fdc78",
+                "sha256:f3ef98d7b76da5eb19c37fda834d50262ff9167c65658d1d8f974d2e4d90676b",
+                "sha256:f4c8cabb46ff8e5d61f56a037974228e978f26bfefce4f61a4b1ac0ba7a2ab72"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==0.18.0"
+        },
         "pyserial": {
             "hashes": [
                 "sha256:3c77e014170dfffbd816e6ffc205e9842efb10be9f58ec16d3e8675b4925cddb",
@@ -450,11 +556,11 @@
         },
         "python-dateutil": {
             "hashes": [
-                "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c",
-                "sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a"
+                "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
+                "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.8.1"
+            "version": "==2.8.2"
         },
         "pyyaml": {
             "hashes": [
@@ -491,15 +597,13 @@
             ],
             "version": "==5.4.1"
         },
-        "rpi.gpio": {
+        "requests": {
             "hashes": [
-                "sha256:5cd2f3c88d0b1e2f4780c905702c0474768c2bc113fb793121c2e117b401ab16",
-                "sha256:6a4791f41cafc2ee6e4cb70e5bd31fadc66a0cfab29b38df8723a98f6f73ad5a",
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-                "sha256:7da5235aeba20da39ad4fb97f3ba3a2c6b2d60bba8958b00a4df42f608c6d42e"
+                "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24",
+                "sha256:b8aa58f8cf793ffd8782d3d8cb19e66ef36f7aba4353eec859e74678b01b07a7"
             ],
-            "markers": "platform_machine == 'armv7l'",
-            "version": "==0.7.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
+            "version": "==2.26.0"
         },
         "sangaboard": {
             "hashes": [
@@ -534,6 +638,14 @@
             "markers": "python_version < '3.10' and python_version >= '3.7'",
             "version": "==1.6.3"
         },
+        "semver": {
+            "hashes": [
+                "sha256:ced8b23dceb22134307c1b8abfa523da14198793d9787ac838e70e29e77458d4",
+                "sha256:fa0fe2722ee1c3f57eac478820c3a5ae2f624af8264cbdf9000c980ff7f75e3f"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==2.13.0"
+        },
         "six": {
             "hashes": [
                 "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
@@ -559,6 +671,14 @@
             "markers": "python_version < '3.8'",
             "version": "==3.7.4.3"
         },
+        "urllib3": {
+            "hashes": [
+                "sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4",
+                "sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
+            "version": "==1.26.6"
+        },
         "webargs": {
             "hashes": [
                 "sha256:2f3d883ce9f348fa884889440fcc1b207e7c67b04be5e90be00a5be73e2cd91d",
@@ -584,11 +704,11 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76",
-                "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"
+                "sha256:957cfda87797e389580cb8b9e3870841ca991e2125350677b2ca83a0e99390a3",
+                "sha256:f5812b1e007e48cff63449a5e9f4e7ebea716b4111f9c4f9a645f91d579bf0c4"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==3.4.1"
+            "version": "==3.5.0"
         }
     },
     "develop": {
@@ -601,14 +721,15 @@
         },
         "apispec": {
             "extras": [
+                "validation",
                 "yaml"
             ],
             "hashes": [
-                "sha256:aaded4ae451752c58b70e579923d8db7daf0b71f62def8c8fe7a2a52bd7c06a2",
-                "sha256:f49c49e0dee3fa545462d4536856458aae61b972727b3c32eabc7d6db8c074f8"
+                "sha256:6613dbc39f41cd58942a697f11c8762ba18422bd173fe0bdfc1535b83d3f84f0",
+                "sha256:79029486d36a0d7f3c659dbf6ae50a91fbed0c22dcd5376f592e076c130bc7f9"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==4.4.1"
+            "version": "==4.7.1"
         },
         "apispec-webframeworks": {
             "hashes": [
@@ -627,11 +748,11 @@
         },
         "astroid": {
             "hashes": [
-                "sha256:4db03ab5fc3340cf619dbc25e42c2cc3755154ce6009469766d7143d1fc2ee4e",
-                "sha256:8a398dfce302c13f14bab13e2b14fe385d32b73f4e4853b9bdfb64598baa1975"
+                "sha256:38b95085e9d92e2ca06cf8b35c12a74fa81da395a6f9e65803742e6509c05892",
+                "sha256:606b2911d10c3dcf35e58d2ee5c97360e8477d7b9f3efc3f24811c93e6fc2cd9"
             ],
             "markers": "python_version ~= '3.6'",
-            "version": "==2.5.6"
+            "version": "==2.6.2"
         },
         "attrs": {
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@@ -662,15 +783,15 @@
                 "sha256:02a409bd2cb193b20d9eb015ca31400bd3e1721ec5d702e1b96de54608ff5a8f",
                 "sha256:d39c3afebb59ec865fb1247dfd951d7090c159ab0cf3e4291e0869d3be33776c"
             ],
-            "markers": "python_version >= '3.6' and python_version < '4.0'",
+            "markers": "python_version >= '3.6' and python_version < '4'",
             "version": "==0.1.4"
         },
         "certifi": {
             "hashes": [
-                "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c",
-                "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"
+                "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee",
+                "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"
             ],
-            "version": "==2020.12.5"
+            "version": "==2021.5.30"
         },
         "chardet": {
             "hashes": [
@@ -680,6 +801,14 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==4.0.0"
         },
+        "charset-normalizer": {
+            "hashes": [
+                "sha256:88fce3fa5b1a84fdcb3f603d889f723d1dd89b26059d0123ca435570e848d5e1",
+                "sha256:c46c3ace2d744cfbdebceaa3c19ae691f53ae621b39fd7570f59d14fb7f2fd12"
+            ],
+            "markers": "python_version >= '3'",
+            "version": "==2.0.3"
+        },
         "click": {
             "hashes": [
                 "sha256:a3747c864f8e400a3664f5f4fd6dae11b4605bf6b727dae7b6f22ba9bd0a194a",
@@ -751,16 +880,16 @@
                 "sha256:f0b278ce10936db1a37e6954e15a3730bea96a0997c26d7fee88e6c396c2086d",
                 "sha256:f11642dddbb0253cc8853254301b51390ba0081750a8ac03f20ea8103f0c56b6"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4.0'",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
             "version": "==5.5"
         },
         "docutils": {
             "hashes": [
-                "sha256:686577d2e4c32380bb50cbb22f575ed742d58168cee37e99117a854bcd88f125",
-                "sha256:cf316c8370a737a022b72b56874f6602acf974a37a9fba42ec2876387549fc61"
+                "sha256:0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af",
+                "sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"
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             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==0.17.1"
+            "version": "==0.16"
         },
         "expiringdict": {
             "hashes": [
@@ -802,12 +931,11 @@
         },
         "idna": {
             "hashes": [
-                "sha256:4a57a6379512ade94fa99e2fa46d3cd0f2f553040548d0e2958c6ed90ee48226",
-                "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6",
-                "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"
+                "sha256:14475042e284991034cb48e06f6851428fb14c4dc953acd9be9a5e95c7b6dd7a",
+                "sha256:467fbad99067910785144ce333826c71fb0e63a425657295239737f7ecd125f3"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.10"
+            "markers": "python_version >= '3'",
+            "version": "==3.2"
         },
         "ifaddr": {
             "hashes": [
@@ -826,11 +954,11 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:8c501196e49fb9df5df43833bdb1e4328f64847763ec8a50703148b73784d581",
-                "sha256:d7eb1dea6d6a6086f8be21784cc9e3bcfa55872b52309bc5fad53a8ea444465d"
+                "sha256:079ada16b7fc30dfbb5d13399a5113110dab1aa7c2bc62f66af75f0b717c8cac",
+                "sha256:9f55f560e116f8643ecf2922d9cd3e1c7e8d52e683178fecd9d08f6aa357e11e"
             ],
             "markers": "python_version < '3.8'",
-            "version": "==4.0.1"
+            "version": "==4.6.1"
         },
         "iniconfig": {
             "hashes": [
@@ -840,13 +968,20 @@
             ],
             "version": "==1.1.1"
         },
+        "isodate": {
+            "hashes": [
+                "sha256:2e364a3d5759479cdb2d37cce6b9376ea504db2ff90252a2e5b7cc89cc9ff2d8",
+                "sha256:aa4d33c06640f5352aca96e4b81afd8ab3b47337cc12089822d6f322ac772c81"
+            ],
+            "version": "==0.6.0"
+        },
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             "hashes": [
-                "sha256:0a943902919f65c5684ac4e0154b1ad4fac6dcaa5d9f3426b732f1c8b5419be6",
-                "sha256:2bb1680aad211e3c9944dbce1d4ba09a989f04e238296c87fe2139faa26d655d"
+                "sha256:eed17b53c3e7912425579853d078a0832820f023191561fcee9d7cae424e0813",
+                "sha256:f65ce5bd4cbc6abdfbe29afc2f0245538ab358c14590912df638033f157d555e"
             ],
-            "markers": "python_version >= '3.6' and python_version < '4'",
-            "version": "==5.8.0"
+            "markers": "python_version < '4.0' and python_full_version >= '3.6.1'",
+            "version": "==5.9.2"
         },
         "itsdangerous": {
             "hashes": [
@@ -864,12 +999,19 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==2.11.3"
         },
+        "jsonschema": {
+            "hashes": [
+                "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163",
+                "sha256:c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a"
+            ],
+            "version": "==3.2.0"
+        },
         "labthings": {
             "hashes": [
                 "sha256:4f286ea585e596aeb67a02d5bd822b2c89828693026085829e15e415a2d2d287",
                 "sha256:970bb6a81f0e007b55e575e6eafe6bba10974d671f2767b91631f001ff53cf0e"
             ],
-            "markers": "python_version >= '3.6' and python_version < '4.0'",
+            "markers": "python_version >= '3.6' and python_version < '4'",
             "version": "==1.2.4"
         },
         "lazy-object-proxy": {
@@ -955,6 +1097,13 @@
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==4.6.3"
         },
+        "m2r": {
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@@ -998,11 +1147,11 @@
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@@ -1011,33 +1160,41 @@
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+                "sha256:ebfeaff7e0bb1c293008a49b2b2c033a7cec3805006a8284fa1a44ad8c30446b",
+                "sha256:ecd84834f58daf94d3a4874a11997180380ef9af11b1fd5f81dbb8599b3c3446",
+                "sha256:f1082f4f15a681b435686ed3fc0232128a222fed6792a47fae5cf081eb751ccf",
+                "sha256:fc9fa0fa88423c0e74db52fe13939aa506789f924a2a879e31f1d415e39a0db2",
+                "sha256:fd0f0629e27d97eec2f51500afbe0845876fdcd89d412035f4d7beb618c51066",
+                "sha256:ff4de00d4f19d622561dee58a5121045ca265df3665751d14433149bbd748f55"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==4.5.1.48"
+            "version": "==4.5.3.56"
         },
         "openflexure-microscope-server": {
             "editable": true,
@@ -1115,11 +1292,11 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5",
-                "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"
+                "sha256:7dc96269f53a4ccec5c0670940a4281106dd0bb343f47b7471f779df49c2fbe7",
+                "sha256:c86254f9220d55e31cc94d69bade760f0847da8000def4dfe1c6b872fd14ff14"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.9"
+            "markers": "python_version >= '3.6'",
+            "version": "==21.0"
         },
         "pastel": {
             "hashes": [
@@ -1154,6 +1331,7 @@
                 "sha256:25930fadde8019f374400f7986e8404c8b781ce519da27792cbe46eabec00c4d",
                 "sha256:39b8830992872e00605ec6eb0d83efad488553f10d79066b8b47c8be38e126b3",
                 "sha256:431b15cffbf949e89df2f7b48528be18b78bfa5177cb3036284a5508159492b5",
+                "sha256:4a2ef919795ad6fc28c47be3f16ec8add4e8c6daa01871e25788cda1b244b162",
                 "sha256:52125833b070791fcb5710fabc640fc1df07d087fc0c0f02d3661f76c23c5b8b",
                 "sha256:5e51ee2b8114def244384eda1c82b10e307ad9778dac5c83fb0943775a653cd8",
                 "sha256:612cfda94e9c8346f239bf1a4b082fdd5c8143cf82d685ba2dba76e7adeeb233",
@@ -1193,9 +1371,19 @@
                 "sha256:6fb3021603d4421c6fcc40072bbcf150a6c52ef70ff4d3be089b8b04e015ef5a",
                 "sha256:70b97cb194b978dc464c70793e85e6f746cddf82b84a38bfb135946ad71ae19c"
             ],
-            "markers": "python_version >= '3.6' and python_version < '4'",
+            "markers": "python_version >= '3.6' and python_version < '4.0'",
             "version": "==0.10.0"
         },
+        "prance": {
+            "extras": [
+                "osv"
+            ],
+            "hashes": [
+                "sha256:03374b020a4f643c71fc941bb7d1e4852331732714b4b6ebbbd53dd5f75adacf",
+                "sha256:43ebe3a5b38f0c65c428427004c4d8ce8d7155ddad50610276c89c192680f138"
+            ],
+            "version": "==0.21.2"
+        },
         "psutil": {
             "hashes": [
                 "sha256:094f899ac3ef72422b7e00411b4ed174e3c5a2e04c267db6643937ddba67a05b",
@@ -1204,6 +1392,7 @@
                 "sha256:21231ef1c1a89728e29b98a885b8e0a8e00d09018f6da5cdc1f43f988471a995",
                 "sha256:28f771129bfee9fc6b63d83a15d857663bbdcae3828e1cb926e91320a9b5b5cd",
                 "sha256:70387772f84fa5c3bb6a106915a2445e20ac8f9821c5914d7cbde148f4d7ff73",
+                "sha256:7d5e1be385287e2334f708ec261b8ee364ac2bcb07eadcbd7a254f9cd476b65f",
                 "sha256:891e24ec41be15a99c00b0f3a378d3d439876fe18793f874a4f8e796fec77458",
                 "sha256:a9340f6b9ff887d77aed72a51d101ca0f21b8d82edc6c85105d1d9f027544365",
                 "sha256:b560f5cd86cf8df7bcd258a851ca1ad98f0d5b8b98748e877a0aec4e9032b465",
@@ -1233,11 +1422,11 @@
         },
         "pylint": {
             "hashes": [
-                "sha256:586d8fa9b1891f4b725f587ef267abe2a1bad89d6b184520c7f07a253dd6e217",
-                "sha256:f7e2072654a6b6afdf5e2fb38147d3e2d2d43c89f648637baab63e026481279b"
+                "sha256:23a1dc8b30459d78e9ff25942c61bb936108ccbe29dd9e71c01dc8274961709a",
+                "sha256:5d46330e6b8886c31b5e3aba5ff48c10f4aa5e76cbf9002c6544306221e63fbc"
             ],
             "markers": "python_version ~= '3.6'",
-            "version": "==2.8.2"
+            "version": "==2.9.3"
         },
         "pyparsing": {
             "hashes": [
@@ -1247,6 +1436,34 @@
             "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
+        "pyrsistent": {
+            "hashes": [
+                "sha256:097b96f129dd36a8c9e33594e7ebb151b1515eb52cceb08474c10a5479e799f2",
+                "sha256:2aaf19dc8ce517a8653746d98e962ef480ff34b6bc563fc067be6401ffb457c7",
+                "sha256:404e1f1d254d314d55adb8d87f4f465c8693d6f902f67eb6ef5b4526dc58e6ea",
+                "sha256:48578680353f41dca1ca3dc48629fb77dfc745128b56fc01096b2530c13fd426",
+                "sha256:4916c10896721e472ee12c95cdc2891ce5890898d2f9907b1b4ae0f53588b710",
+                "sha256:527be2bfa8dc80f6f8ddd65242ba476a6c4fb4e3aedbf281dfbac1b1ed4165b1",
+                "sha256:58a70d93fb79dc585b21f9d72487b929a6fe58da0754fa4cb9f279bb92369396",
+                "sha256:5e4395bbf841693eaebaa5bb5c8f5cdbb1d139e07c975c682ec4e4f8126e03d2",
+                "sha256:6b5eed00e597b5b5773b4ca30bd48a5774ef1e96f2a45d105db5b4ebb4bca680",
+                "sha256:73ff61b1411e3fb0ba144b8f08d6749749775fe89688093e1efef9839d2dcc35",
+                "sha256:772e94c2c6864f2cd2ffbe58bb3bdefbe2a32afa0acb1a77e472aac831f83427",
+                "sha256:773c781216f8c2900b42a7b638d5b517bb134ae1acbebe4d1e8f1f41ea60eb4b",
+                "sha256:8c065dcc8ed1c7412be6f0cfa69e49434c61bf73953ee30ddf35420795408e47",
+                "sha256:a0c772d791c38bbc77be659af29bb14c38ced151433592e326361610250c605b",
+                "sha256:b29b869cf58412ca5738d23691e96d8aff535e17390128a1a52717c9a109da4f",
+                "sha256:c1a9ff320fa699337e05edcaae79ef8c2880b52720bc031b219e5b5008ebbdef",
+                "sha256:cd3caef37a415fd0dae6148a1b6957a8c5f275a62cca02e18474608cb263640c",
+                "sha256:d5ec194c9c573aafaceebf05fc400656722793dac57f254cd4741f3c27ae57b4",
+                "sha256:da6e5e818d18459fa46fac0a4a4e543507fe1110e808101277c5a2b5bab0cd2d",
+                "sha256:e79d94ca58fcafef6395f6352383fa1a76922268fa02caa2272fff501c2fdc78",
+                "sha256:f3ef98d7b76da5eb19c37fda834d50262ff9167c65658d1d8f974d2e4d90676b",
+                "sha256:f4c8cabb46ff8e5d61f56a037974228e978f26bfefce4f61a4b1ac0ba7a2ab72"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==0.18.0"
+        },
         "pyserial": {
             "hashes": [
                 "sha256:3c77e014170dfffbd816e6ffc205e9842efb10be9f58ec16d3e8675b4925cddb",
@@ -1272,11 +1489,11 @@
         },
         "python-dateutil": {
             "hashes": [
-                "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c",
-                "sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a"
+                "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86",
+                "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==2.8.1"
+            "version": "==2.8.2"
         },
         "pytz": {
             "hashes": [
@@ -1322,11 +1539,11 @@
         },
         "requests": {
             "hashes": [
-                "sha256:27973dd4a904a4f13b263a19c866c13b92a39ed1c964655f025f3f8d3d75b804",
-                "sha256:c210084e36a42ae6b9219e00e48287def368a26d03a048ddad7bfee44f75871e"
+                "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24",
+                "sha256:b8aa58f8cf793ffd8782d3d8cb19e66ef36f7aba4353eec859e74678b01b07a7"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
-            "version": "==2.25.1"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
+            "version": "==2.26.0"
         },
         "rope": {
             "hashes": [
@@ -1336,16 +1553,6 @@
             ],
             "version": "==0.14.0"
         },
-        "rpi.gpio": {
-            "hashes": [
-                "sha256:5cd2f3c88d0b1e2f4780c905702c0474768c2bc113fb793121c2e117b401ab16",
-                "sha256:6a4791f41cafc2ee6e4cb70e5bd31fadc66a0cfab29b38df8723a98f6f73ad5a",
-                "sha256:7424bc6c205466764f30f666c18187a0824077daf20b295c42f08aea2cb87d3f",
-                "sha256:7da5235aeba20da39ad4fb97f3ba3a2c6b2d60bba8958b00a4df42f608c6d42e"
-            ],
-            "markers": "platform_machine == 'armv7l'",
-            "version": "==0.7.0"
-        },
         "sangaboard": {
             "hashes": [
                 "sha256:3791159d57a749571f89acdce70aa9c1de82afef71f5186d5e2845c7be44698c",
@@ -1379,6 +1586,14 @@
             "markers": "python_version < '3.10' and python_version >= '3.7'",
             "version": "==1.6.3"
         },
+        "semver": {
+            "hashes": [
+                "sha256:ced8b23dceb22134307c1b8abfa523da14198793d9787ac838e70e29e77458d4",
+                "sha256:fa0fe2722ee1c3f57eac478820c3a5ae2f624af8264cbdf9000c980ff7f75e3f"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==2.13.0"
+        },
         "six": {
             "hashes": [
                 "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
@@ -1396,11 +1611,18 @@
         },
         "sphinx": {
             "hashes": [
-                "sha256:b5c2ae4120bf00c799ba9b3699bc895816d272d120080fbc967292f29b52b48c",
-                "sha256:d1cb10bee9c4231f1700ec2e24a91be3f3a3aba066ea4ca9f3bbe47e59d5a1d4"
+                "sha256:19010b7b9fa0dc7756a6e105b2aacd3a80f798af3c25c273be64d7beeb482cb1",
+                "sha256:2320d4e994a191f4b4be27da514e46b3d6b420f2ff895d064f52415d342461e8"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==4.0.2"
+            "markers": "python_version >= '3.5'",
+            "version": "==3.5.4"
+        },
+        "sphinx-rtd-theme": {
+            "hashes": [
+                "sha256:32bd3b5d13dc8186d7a42fc816a23d32e83a4827d7d9882948e7b837c232da5a",
+                "sha256:4a05bdbe8b1446d77a01e20a23ebc6777c74f43237035e76be89699308987d6f"
+            ],
+            "version": "==0.5.2"
         },
         "sphinxcontrib-applehelp": {
             "hashes": [
@@ -1420,11 +1642,11 @@
         },
         "sphinxcontrib-htmlhelp": {
             "hashes": [
-                "sha256:3c0bc24a2c41e340ac37c85ced6dafc879ab485c095b1d65d2461ac2f7cca86f",
-                "sha256:e8f5bb7e31b2dbb25b9cc435c8ab7a79787ebf7f906155729338f3156d93659b"
+                "sha256:d412243dfb797ae3ec2b59eca0e52dac12e75a241bf0e4eb861e450d06c6ed07",
+                "sha256:f5f8bb2d0d629f398bf47d0d69c07bc13b65f75a81ad9e2f71a63d4b7a2f6db2"
             ],
-            "markers": "python_version >= '3.5'",
-            "version": "==1.0.3"
+            "markers": "python_version >= '3.6'",
+            "version": "==2.0.0"
         },
         "sphinxcontrib-httpdomain": {
             "hashes": [
@@ -1441,6 +1663,14 @@
             "markers": "python_version >= '3.5'",
             "version": "==1.0.1"
         },
+        "sphinxcontrib-openapi": {
+            "hashes": [
+                "sha256:1c1bd10d7653912c59a42f727c62cbb7b75f7905ddd9ccc477ebfd1bc69f0cf3",
+                "sha256:3c2a33c1d24733e6f22a0091b8172d08c723a7f192699f0dbfac99bb380dcb31"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==0.7.0"
+        },
         "sphinxcontrib-qthelp": {
             "hashes": [
                 "sha256:4c33767ee058b70dba89a6fc5c1892c0d57a54be67ddd3e7875a18d14cba5a72",
@@ -1451,11 +1681,11 @@
         },
         "sphinxcontrib-serializinghtml": {
             "hashes": [
-                "sha256:eaa0eccc86e982a9b939b2b82d12cc5d013385ba5eadcc7e4fed23f4405f77bc",
-                "sha256:f242a81d423f59617a8e5cf16f5d4d74e28ee9a66f9e5b637a18082991db5a9a"
+                "sha256:352a9a00ae864471d3a7ead8d7d79f5fc0b57e8b3f95e9867eb9eb28999b92fd",
+                "sha256:aa5f6de5dfdf809ef505c4895e51ef5c9eac17d0f287933eb49ec495280b6952"
             ],
             "markers": "python_version >= '3.5'",
-            "version": "==1.1.4"
+            "version": "==1.1.5"
         },
         "toml": {
             "hashes": [
@@ -1521,11 +1751,11 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:2f4da4594db7e1e110a944bb1b551fdf4e6c136ad42e4234131391e21eb5b0df",
-                "sha256:e7b021f7241115872f92f43c6508082facffbd1c048e3c6e2bb9c2a157e28937"
+                "sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4",
+                "sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
-            "version": "==1.26.4"
+            "version": "==1.26.6"
         },
         "webargs": {
             "hashes": [
@@ -1546,6 +1776,7 @@
         "wrapt": {
             "hashes": [
                 "sha256:1ba3a6bcb5014ed4d9c98afe8aa47b5ed320f84292b4f1b9f6afa0f4b2b91351",
+                "sha256:548a5381002654b72c8b8d1e167722e2a11169535d017d79d9cdee76502c1bc6",
                 "sha256:b62ffa81fb85f4332a4f609cab4ac40709470da05643a082ec1eb88e6d9b97d7",
                 "sha256:c16fd7cad3d27a5db392ae0e6215533a912a7d3d83a40b8cf275744276989780",
                 "sha256:d3294c918c5529e50b5454d39b589648d9baf6152e380067606d5566d71369a0"
@@ -1561,11 +1792,11 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76",
-                "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"
+                "sha256:957cfda87797e389580cb8b9e3870841ca991e2125350677b2ca83a0e99390a3",
+                "sha256:f5812b1e007e48cff63449a5e9f4e7ebea716b4111f9c4f9a645f91d579bf0c4"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==3.4.1"
+            "version": "==3.5.0"
         }
     }
 }
diff --git a/openflexure_microscope/api/app.py b/openflexure_microscope/api/app.py
index 6e3c4e0e..5384b828 100644
--- a/openflexure_microscope/api/app.py
+++ b/openflexure_microscope/api/app.py
@@ -258,7 +258,16 @@ def generate_openapi():
             'Use .yml or .yaml for YAML (which is the default'
         )
     )
+    parser.add_argument(
+        "--validate", 
+        action="store_true", 
+        help="Validate the API spec, returning an error code if it does not pass."
+    )
     args = parser.parse_args()
+    if args.validate:
+        import apispec.utils
+        if apispec.utils.validate_spec(labthing.spec):
+            print("OpenAPI specification validated OK.")
     fname = args.output
     if fname.endswith(".json"):
         import json
@@ -268,7 +277,6 @@ def generate_openapi():
         with open(fname, 'w') as fd:
             fd.write(labthing.spec.to_yaml())
 
-
 # Start the app if the module is run directly
 if __name__ == "__main__":
     ofm_serve()
diff --git a/setup.py b/setup.py
index ed4cfd36..614961d5 100644
--- a/setup.py
+++ b/setup.py
@@ -44,6 +44,7 @@ setup(
     # set up the project for development, you use those specific packages, rather than
     # the looser specifications given here.
     install_requires=[
+        "apispec[validation]", # We need the extra to validate the spec
         "Flask ~= 1.0",
         "Pillow ~= 7.2.0",
         "numpy ~= 1.20",