> For the complete documentation index, see [llms.txt](https://docs.learncard.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.learncard.com/reference/learncloud-storage-api/utilities.md).

# Utilities

## Check health of endpoint

> Check if the endpoint is healthy and well

```json
{"openapi":"3.1.0","info":{"title":"LearnCloud Storage API","version":"1.0.0"},"tags":[{"name":"Utilities"}],"servers":[{"url":"/api"}],"security":[{"Authorization":[]}],"components":{"securitySchemes":{"Authorization":{"type":"http","scheme":"bearer"}},"schemas":{"error.UNAUTHORIZED":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Authorization not provided error (401)","description":"The error information"},"error.FORBIDDEN":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Insufficient access error (403)","description":"The error information"},"error.INTERNAL_SERVER_ERROR":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Internal server error error (500)","description":"The error information"}}},"paths":{"/health-check":{"get":{"operationId":"utilities-healthCheck","summary":"Check health of endpoint","description":"Check if the endpoint is healthy and well","tags":["Utilities"],"responses":{"200":{"description":"Successful response","content":{"application/json":{"schema":{"type":"string"}}}},"401":{"description":"Authorization not provided","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.UNAUTHORIZED"}}}},"403":{"description":"Insufficient access","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.FORBIDDEN"}}}},"500":{"description":"Internal server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.INTERNAL_SERVER_ERROR"}}}}}}}}}
```

## Deep health check (exercises DIDKit end to end)

> Issues and verifies a test credential + presentation with the service keypair, proving the full DIDKit crypto path (plugin load, signing, and the runtime delegation inside the native plugin) works. Reports which DIDKit engine loaded. Added after the 2026-07-02 incidents, where shallow health checks stayed green while DIDKit paths were broken.

```json
{"openapi":"3.1.0","info":{"title":"LearnCloud Storage API","version":"1.0.0"},"tags":[{"name":"Utilities"}],"servers":[{"url":"/api"}],"security":[{"Authorization":[]}],"components":{"securitySchemes":{"Authorization":{"type":"http","scheme":"bearer"}},"schemas":{"error.UNAUTHORIZED":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Authorization not provided error (401)","description":"The error information"},"error.FORBIDDEN":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Insufficient access error (403)","description":"The error information"},"error.INTERNAL_SERVER_ERROR":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Internal server error error (500)","description":"The error information"}}},"paths":{"/health-check/deep":{"get":{"operationId":"utilities-deepHealthCheck","summary":"Deep health check (exercises DIDKit end to end)","description":"Issues and verifies a test credential + presentation with the service keypair, proving the full DIDKit crypto path (plugin load, signing, and the runtime delegation inside the native plugin) works. Reports which DIDKit engine loaded. Added after the 2026-07-02 incidents, where shallow health checks stayed green while DIDKit paths were broken.","tags":["Utilities"],"responses":{"200":{"description":"Successful response","content":{"application/json":{"schema":{"type":"object","properties":{"healthy":{"type":"boolean"},"version":{"type":"string"},"didkitEngine":{"type":"string","enum":["native","wasm","unloaded"]},"did":{"type":"string"},"vpVerified":{"type":"boolean"},"verificationErrors":{"type":"array","items":{"type":"string"}},"ms":{"type":"number"}},"required":["healthy","version","didkitEngine","did","vpVerified","verificationErrors","ms"],"additionalProperties":false}}}},"401":{"description":"Authorization not provided","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.UNAUTHORIZED"}}}},"403":{"description":"Insufficient access","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.FORBIDDEN"}}}},"500":{"description":"Internal server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.INTERNAL_SERVER_ERROR"}}}}}}}}}
```

## Request a list of valid challenges

> Generates an arbitrary number of valid challenges for a did, then returns them

```json
{"openapi":"3.1.0","info":{"title":"LearnCloud Storage API","version":"1.0.0"},"tags":[{"name":"Utilities"}],"servers":[{"url":"/api"}],"security":[{"Authorization":[]}],"components":{"securitySchemes":{"Authorization":{"type":"http","scheme":"bearer"}},"schemas":{"error.BAD_REQUEST":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Invalid input data error (400)","description":"The error information"},"error.UNAUTHORIZED":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Authorization not provided error (401)","description":"The error information"},"error.FORBIDDEN":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Insufficient access error (403)","description":"The error information"},"error.NOT_FOUND":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Not found error (404)","description":"The error information"},"error.INTERNAL_SERVER_ERROR":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Internal server error error (500)","description":"The error information"}}},"paths":{"/challenges":{"get":{"operationId":"utilities-getChallenges","summary":"Request a list of valid challenges","description":"Generates an arbitrary number of valid challenges for a did, then returns them","tags":["Utilities"],"parameters":[{"in":"query","name":"amount","schema":{"default":100,"type":"integer","exclusiveMinimum":0,"maximum":100}}],"responses":{"200":{"description":"Successful response","content":{"application/json":{"schema":{"type":"array","items":{"type":"string"}}}}},"400":{"description":"Invalid input data","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.BAD_REQUEST"}}}},"401":{"description":"Authorization not provided","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.UNAUTHORIZED"}}}},"403":{"description":"Insufficient access","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.FORBIDDEN"}}}},"404":{"description":"Not found","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.NOT_FOUND"}}}},"500":{"description":"Internal server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.INTERNAL_SERVER_ERROR"}}}}}}}}}
```

## Get LCN Did

> Gets the did:web for the LearnCloud itself

```json
{"openapi":"3.1.0","info":{"title":"LearnCloud Storage API","version":"1.0.0"},"tags":[{"name":"Utilities"}],"servers":[{"url":"/api"}],"security":[{"Authorization":[]}],"components":{"securitySchemes":{"Authorization":{"type":"http","scheme":"bearer"}},"schemas":{"error.UNAUTHORIZED":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Authorization not provided error (401)","description":"The error information"},"error.FORBIDDEN":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Insufficient access error (403)","description":"The error information"},"error.INTERNAL_SERVER_ERROR":{"type":"object","properties":{"message":{"type":"string","description":"The error message"},"code":{"type":"string","description":"The error code"},"issues":{"description":"An array of issues that were responsible for the error","type":"array","items":{"type":"object","properties":{"message":{"type":"string"}},"required":["message"],"additionalProperties":false}}},"required":["message","code"],"additionalProperties":false,"title":"Internal server error error (500)","description":"The error information"}}},"paths":{"/did":{"get":{"operationId":"utilities-getDid","summary":"Get LCN Did","description":"Gets the did:web for the LearnCloud itself","tags":["Utilities"],"responses":{"200":{"description":"Successful response","content":{"application/json":{"schema":{"type":"string"}}}},"401":{"description":"Authorization not provided","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.UNAUTHORIZED"}}}},"403":{"description":"Insufficient access","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.FORBIDDEN"}}}},"500":{"description":"Internal server error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/error.INTERNAL_SERVER_ERROR"}}}}}}}}}
```


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