> ## Documentation Index > Fetch the complete documentation index at: https://docs.signalmd.dev/llms.txt > Use this file to discover all available pages before exploring further. # List calls > The agent's production calls, newest first. Calls with no start time come last. Filters combine. ## OpenAPI ````yaml /api-reference/openapi.json get /v1/agents/{agentId}/calls openapi: 3.1.0 info: title: SignalMD API version: 1.0.0 description: >- SignalMD reads a voice agent's production calls and says what to fix, then tests whether the fix worked. This API exposes the same data the web app shows: agents, calls and their traces, signals, issues, versions and their comparisons, tests, and test runs. Authenticate with `Authorization: Bearer sig_...` (an API key from the API keys page). Read keys may call every `read` operation; write keys may also call `write` operations, within their monthly budget. Each operation's scope is in `x-signal-scope`. Errors share one envelope (`Error`), lists share one cursor scheme (`limit`, `cursor`, `hasMore`, `nextCursor`), and every response carries `Request-Id` and `RateLimit-*` headers. servers: - url: https://api.signalmd.dev description: Production - url: http://localhost:43124 description: Local development security: - bearerAuth: [] tags: - name: Account description: Who the token belongs to and what it may do. - name: Agents description: Voice agents connected to the workspace. - name: Calls description: Production calls, their traces and per-call signals. - name: Signals description: What SignalMD noticed across calls. - name: Issues description: 'Problems worth fixing: where, why, and what to change.' - name: Versions description: Agent versions and how each one did. - name: Comparisons description: Stored comparisons between two versions. - name: Tests description: Tests, test sets, personas and coverage. - name: Runs description: Test runs and the attempts inside them. paths: /v1/agents/{agentId}/calls: get: tags: - Calls summary: List calls description: >- The agent's production calls, newest first. Calls with no start time come last. Filters combine. operationId: listCalls parameters: - schema: type: string format: uuid pattern: >- ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$ example: 3f1c2d4e-5a6b-4c7d-8e9f-0a1b2c3d4e5f description: The agent's id. required: true description: The agent's id. name: agentId in: path - schema: type: integer minimum: 1 maximum: 100 default: 25 description: Items per page, 1 to 100. example: 25 required: false description: Items per page, 1 to 100. name: limit in: query - schema: type: string minLength: 1 description: '`nextCursor` from the previous page.' required: false description: '`nextCursor` from the previous page.' name: cursor in: query - schema: type: integer description: Only calls taken by this agent version. required: false description: Only calls taken by this agent version. name: version in: query - schema: type: string enum: - resolved - unresolved - transferred - abandoned - no_contact description: Only analysed calls with this outcome. required: false description: Only analysed calls with this outcome. name: outcome in: query - schema: type: string format: uuid pattern: >- ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$ example: 3f1c2d4e-5a6b-4c7d-8e9f-0a1b2c3d4e5f description: Only calls that are evidence for this issue. required: false description: Only calls that are evidence for this issue. name: issueId in: query - schema: type: string minLength: 1 maxLength: 200 description: >- Only calls with this signal code detected (`GET /signals` lists the codes). required: false description: >- Only calls with this signal code detected (`GET /signals` lists the codes). name: signal in: query - schema: type: string format: date-time description: >- Only calls that started at or after this time. Calls with no start time never match. required: false description: >- Only calls that started at or after this time. Calls with no start time never match. name: startedAfter in: query - schema: type: string format: date-time description: >- Only calls that started before this time. Calls with no start time never match. required: false description: >- Only calls that started before this time. Calls with no start time never match. name: startedBefore in: query responses: '200': description: A page of calls. content: application/json: schema: $ref: '#/components/schemas/CallList' '400': description: 'Invalid request: a parameter or the body failed validation.' content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Missing, invalid or revoked credentials. content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Not permitted for this principal. content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: >- The agent, or a resource under it, does not exist or is not visible to this key. content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Rate limited. See Retry-After. content: application/json: schema: $ref: '#/components/schemas/Error' '500': description: Server error. The message is generic; quote the request id. content: application/json: schema: $ref: '#/components/schemas/Error' x-codeSamples: - lang: bash label: curl source: >- curl "https://api.signalmd.dev/v1/agents/6f1d2c3b-4a5e-4f60-8b7a-9c0d1e2f3a4b/calls?outcome=abandoned&limit=25" \ -H "Authorization: Bearer $SIGNAL_API_KEY" components: schemas: CallList: type: object properties: object: type: string enum: - list data: type: array items: $ref: '#/components/schemas/CallSummary' hasMore: type: boolean nextCursor: type: - string - 'null' description: Pass as `cursor` for the next page; null on the last page. required: - object - data - hasMore - nextCursor Error: type: object properties: error: type: object properties: type: $ref: '#/components/schemas/ErrorType' code: type: string example: agent_not_found description: The specific reason; stable within v1. message: type: string example: Agent not found. param: type: - string - 'null' description: The request field at fault, for a validation error. requestId: type: - string - 'null' example: req_8c1f0e2b4a6d9e3f7a5c1b0d quota: type: object properties: metric: type: string example: credits description: >- credits when the workspace's monthly credits are used up, or agents when the plan's agent limit is reached. activity: type: string enum: - observation - testing - chat example: testing description: >- With metric credits: what the request would have spent them on. observation is analysing calls, testing is test runs, chat is the copilot. requested: type: integer example: 18 description: >- With metric credits: the credits the request needed to start. limit: type: integer description: 'The plan''s limit: the month''s credits, or its agents.' used: type: integer description: How much of the limit is used this month. plan: type: string example: free_org description: The workspace's plan slug. upgradePath: type: string example: /billing description: Where in the web app the plan is changed. required: - metric - limit - used - plan - upgradePath description: >- Present when code is quota_exceeded: the plan limit the request would pass. proposalId: type: string format: uuid description: >- Present when code is criteria_locked: the pending criteria proposal the change was filed as. A person approves or rejects it. required: - type - code - message - param - requestId required: - error example: error: type: not_found_error code: agent_not_found message: Agent not found. param: null requestId: req_8c1f0e2b4a6d9e3f7a5c1b0d CallSummary: type: object properties: object: type: string enum: - call id: type: string format: uuid pattern: >- ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$ example: 3f1c2d4e-5a6b-4c7d-8e9f-0a1b2c3d4e5f description: The call's id in SignalMD. providerCallId: type: string description: >- The call's id on the voice platform. Unique within an agent, not across agents. version: type: - integer - 'null' description: The agent version that took the call. startedAt: type: - string - 'null' format: date-time example: '2026-10-02T14:03:07.120Z' endedAt: type: - string - 'null' format: date-time example: '2026-10-02T14:03:07.120Z' durationMs: type: - integer - 'null' direction: type: - string - 'null' description: '`inbound` or `outbound`, as the platform reports it.' disconnectionReason: type: - string - 'null' description: >- Why the call ended, in the platform's words (`user_hangup`, `agent_hangup`, ...). outcome: type: - string - 'null' enum: - resolved - unresolved - transferred - abandoned - no_contact - null description: How the call ended for the caller. Null until the call is analysed. objective: type: - string - 'null' description: >- One line, in the caller's terms, of what they were trying to do. Null until analysed. intent: type: - object - 'null' properties: slug: type: string label: type: string required: - slug - label description: The intent the analysis gave the call. Null until analysed. useCase: type: - object - 'null' properties: slug: type: string label: type: string required: - slug - label description: >- What the caller wanted, from the use case classification. Null when not classified. subUseCase: type: - object - 'null' properties: slug: type: string label: type: string required: - slug - label description: The narrower use case under `useCase`, when there is one. callerPersona: type: - object - 'null' properties: slug: type: string label: type: string required: - slug - label description: The kind of caller the call was read as. Null when not classified. caller: type: object properties: kind: type: string enum: - test - automated - silent - repeat - new description: >- Who called, from facts alone. `test`: a line the agent's own team tests it from; such a call counts in no issue. `automated`: another company's AI agent. `silent`: nobody on the caller's side spoke. `repeat`: a number that called this agent more than once. `new`: none of these. nth: type: - integer - 'null' description: >- For `repeat`: which of that number's calls this is, oldest first. of: type: - integer - 'null' description: 'For `repeat`: how many calls that number made to this agent.' required: - kind - nth - of description: >- Who called, from facts alone. The phone number itself is never returned. counts: type: object properties: turns: type: - integer - 'null' description: Turns in the transcript. Null when the call has no trace. callerTurns: type: - integer - 'null' agentTurns: type: - integer - 'null' toolFailures: type: - integer - 'null' description: >- Tool calls that failed. A tool that ended the call is not a failure. frictions: type: - integer - 'null' description: >- Points of friction the analysis recorded (see the call's `analysis.frictions`). Null until analysed. required: - turns - callerTurns - agentTurns - toolFailures - frictions signalCodes: type: - array - 'null' items: type: string description: >- Codes of the signals detected on the call, sorted. A signal is a symptom noticed on a call, not a diagnosed issue; what to fix is on the issues. Null until analysed, empty when nothing was noticed. required: - object - id - providerCallId - version - startedAt - endedAt - durationMs - direction - disconnectionReason - outcome - objective - intent - useCase - subUseCase - callerPersona - caller - counts - signalCodes example: object: call id: 0b9e8d7c-6f5a-4b3c-9d2e-1f0a9b8c7d6e providerCallId: call_5e0c2b7a91d34f6e8a1b version: 8 startedAt: '2026-10-01T15:42:05.000Z' endedAt: '2026-10-01T15:44:51.000Z' durationMs: 166000 direction: inbound disconnectionReason: user_hangup outcome: abandoned objective: Book a cleaning for next week intent: slug: book_appointment label: Book appointment useCase: slug: scheduling label: Scheduling subUseCase: slug: new_booking label: New booking callerPersona: slug: hurried-returning-patient label: Hurried returning patient caller: kind: repeat nth: 2 of: 3 counts: turns: 24 callerTurns: 12 agentTurns: 12 toolFailures: 1 frictions: 2 signalCodes: - tool_timeout - dead_air ErrorType: type: string enum: - invalid_request_error - authentication_error - budget_error - permission_error - not_found_error - conflict_error - rate_limit_error - api_error securitySchemes: bearerAuth: type: http scheme: bearer description: An API key (`sig_...`), or a session token from the web app. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.