> ## Documentation Index > Fetch the complete documentation index at: https://docs.zelto.ai/llms.txt > Use this file to discover all available pages before exploring further. # List calls to add as cases > Calls of the benchmark's agents that have a transcript (and, for STT benchmarks, a recording), newest first, with how many cases each already feeds. No call content is returned. ## OpenAPI ````yaml /docs-openapi.json get /v1/benchmarks/{id}/call-candidates openapi: 3.1.0 info: title: Zelto REST API version: v1 description: >- Programmatic access to your Zelto organization. Every endpoint is scoped to the organization the API key belongs to. Mint a key at Settings → Integrations → API integration. servers: - url: https://api.zelto.ai description: Production security: - bearerAuth: [] tags: - name: Monitors description: Filtered, asynchronous exports of stored monitor results. - name: Agents description: Voice and text agents normalised through Zelto's ingestion pipeline. - name: Conversations description: >- Phone calls, chats, and voicemails — plus their transcripts and recordings. - name: Customer Metrics description: >- Customer-provided evaluations attached to a conversation (requires metrics enabled). - name: Reviews description: Human review state for conversations. - name: Buckets description: Reviewer routing — group conversations for batched review. - name: Companies description: Clients or brands your agents work for, and their logos. - name: Findings description: >- Structured issues discovered during analysis, with optional conversation attachments and comments. - name: Experiments description: >- Prospective measurement of two externally routed prompt versions across independent monitor outcomes. - name: Organizations description: >- Headless org provisioning. Requires an admin/service API key (not a read-only org-scoped customer key). - name: AI providers description: >- Your organization's own (bring-your-own) AI provider keys. Monitors can run on them instead of Zelto's built-in models. Owner or admin keys only; the secret is write-only. - name: Benchmarks description: >- Repeatable evaluations of agent prompts, models and speech-to-text engines over a fixed set of cases, scored by Judges. paths: /v1/benchmarks/{id}/call-candidates: get: tags: - Benchmarks summary: List calls to add as cases description: >- Calls of the benchmark's agents that have a transcript (and, for STT benchmarks, a recording), newest first, with how many cases each already feeds. No call content is returned. operationId: listBenchmarkCallCandidates parameters: - name: id in: path required: true description: Benchmark id. schema: type: string format: uuid - name: agentId in: query required: false description: Only this agent's calls (must be assigned to the benchmark). schema: type: string format: uuid - name: from in: query required: false description: Calls on or after this date (YYYY-MM-DD, UTC). schema: type: string format: date - name: to in: query required: false description: Calls on or before this date (YYYY-MM-DD, UTC). schema: type: string format: date - name: endedReason in: query required: false schema: type: string maxLength: 200 - name: hasToolCalls in: query required: false description: Only calls where the agent called a tool. schema: anyOf: - type: boolean - type: string enum: - 'true' - 'false' - name: search in: query required: false schema: type: string maxLength: 200 - $ref: '#/components/parameters/Limit' - $ref: '#/components/parameters/Cursor' responses: '200': description: Successful response. content: application/json: schema: type: object properties: data: type: array items: $ref: '#/components/schemas/BenchmarkCallCandidate' nextCursor: description: Cursor for the next page, or null on the last page. type: - string - 'null' required: - data - nextCursor '400': $ref: '#/components/responses/ValidationFailed' '401': $ref: '#/components/responses/Unauthorized' '404': $ref: '#/components/responses/NotFound' components: parameters: Limit: name: limit in: query required: false description: >- Items per page. Default 50, max 200 (larger values are clamped to 200). Must be a positive integer; anything else is rejected with a 400 `invalid_parameter`. schema: type: integer minimum: 1 maximum: 200 default: 50 Cursor: name: cursor in: query required: false description: >- Opaque pagination cursor. Pass the `nextCursor` returned by the previous page, unchanged. A cursor this API did not issue is rejected with a 400 `invalid_parameter`. List endpoints also answer 400 `unknown_query_parameter` (listing the valid names) for any query parameter they do not accept, so a misspelled filter such as `agent_id` is never silently ignored. schema: type: string schemas: BenchmarkCallCandidate: type: object properties: id: type: string label: type: string description: What the Conversations list shows in its ID column. agent: $ref: '#/components/schemas/BenchmarkAgentRef' callTime: type: string description: ISO 8601 timestamp. durationSeconds: type: - number - 'null' endedReason: type: - string - 'null' hasRecording: type: boolean toolCallCount: type: integer existingCases: type: integer description: Cases this benchmark already has from the call. required: - id - label - agent - callTime - durationSeconds - endedReason - hasRecording - toolCallCount - existingCases description: A production call that can become cases. BenchmarkAgentRef: type: object properties: id: type: string name: type: string required: - id - name description: An agent the benchmark is assigned to. Error: type: object required: - error properties: error: type: string description: >- Short error name: `Unauthorized`, `Validation failed`, `Not found`, or a stable snake_case code you can match on, such as `unknown_query_parameter`, `invalid_parameter`, `payload_too_large` or `not_found`. message: type: string description: A plain-English sentence saying what is wrong and how to fix it. code: type: string description: >- Stable, machine-readable cause; match on this rather than on `error` or `message`. On a 401: `missing_credentials`, `malformed_credentials`, `ingest_key_not_allowed` (a write-only observability ingest key was used on an endpoint that needs an API key), `key_expired` or `invalid_credentials`. Elsewhere, for example: `not_found`, `invalid_parameter`, `unknown_query_parameter`, `missing_parameter`, `validation_failed`, `invalid_json`, `payload_too_large`, `conversation_not_found`, `plan_required`. hint: type: string description: >- The next step to try: where to find the right id, which parameters the endpoint takes, how to upgrade the plan, how to authenticate. parameter: type: string description: 'With `invalid_parameter`: the query parameter that was rejected.' unknown: type: array items: type: string description: >- With `unknown_query_parameter`: the parameters that were sent but are not accepted here. valid: type: array items: type: string description: >- With `unknown_query_parameter`: the parameters this endpoint accepts. details: type: object additionalProperties: true responses: ValidationFailed: description: >- The request body or query string failed validation. `code` says which kind (`validation_failed`, `invalid_json`, `invalid_parameter`, `unknown_query_parameter`, `missing_parameter`), and an enum filter names the allowed values in `valid` (every repeated value is checked, e.g. `?status=open&status=zz` is a 400). A `validation_failed` body also carries `message` (the first failing fields), `hint` (how to fix it, for example that a finding `description` is a TipTap JSON document and not a string) and `details` (field name to messages). content: application/json: schema: $ref: '#/components/schemas/Error' Unauthorized: description: >- Missing or invalid API key. The body names the cause in `code` (for example `ingest_key_not_allowed` when a write-only ingest key is used here) with a `message` and `hint`. content: application/json: schema: $ref: '#/components/schemas/Error' NotFound: description: >- Resource not found in your organization. Also returned when a path id is not a UUID, and `{ "error": "not_found" }` for a path this API does not have. The body keeps `error: "Not found"` and adds `code: "not_found"` and a `hint`. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: bearerAuth: type: http scheme: bearer description: >- Send `Authorization: Bearer YOUR_API_KEY`. The key resolves to a single organization. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.