> ## Documentation Index > Fetch the complete documentation index at: https://docs.agentmark.co/llms.txt > Use this file to discover all available pages before exploring further. # List spans > Query spans across all traces. Supports filtering by type, status, model, name, and duration range. ## OpenAPI ````yaml /openapi.yaml get /v1/spans openapi: 3.0.3 info: contact: email: hello@agentmark.co url: https://docs.agentmark.co description: >- The AgentMark Gateway API lets you ingest traces, create scores, and retrieve prompt templates programmatically. Most developers should use the [AgentMark SDK](/introduction/overview) for integration. The REST API is for cases where you need direct HTTP access or are building a custom integration. Versioning: every endpoint is prefixed with `/v1/`. Breaking changes ship under a new version prefix (`/v2/`, etc.) with a 90-day-minimum deprecation window — see [API versioning & stability](/api-reference/versioning) for the full policy on what constitutes a breaking vs. additive change. title: AgentMark Gateway API version: '1.0' servers: - description: Production (AgentMark Cloud) url: https://api.agentmark.co - description: Local dev server (`npx @agentmark-ai/cli dev`) url: http://localhost:9418 security: - AppId: [] BearerAuth: [] tags: - description: Ingest, query, and export OpenTelemetry trace data. name: Traces - description: >- Coding-agent session ingest (outerlayer sync) and content-addressed session images. name: Agents - description: >- Eval trial-result ingest: per-trial score rows plus full-fidelity artifact blobs. name: Evals - description: Query individual spans across traces. name: Spans - description: Create, retrieve, list, and delete score records for spans and traces. name: Scoring - description: Structured-filter search across observability resources. name: Search - description: Query server feature availability. name: Capabilities - description: Per-model LLM pricing data. Public, unauthenticated. name: Pricing - description: >- Create, list, and revoke tenant API keys. Plaintext returned exactly once at creation. name: API Keys - description: >- List and retrieve score configuration definitions from the synced project config. name: Score Configs - description: Per-app named environments (e.g. `dev`, `prod`). CRUD for env lifecycle. name: Environments - description: >- App CRUD — the top-level tenant entity every other resource hangs off. Lets a headless agent provision an app without the dashboard. name: Apps - description: >- Cloud workers — terminal coding agents on managed compute. Launch one-shot runs or persistent multi-turn sessions against the app's connected repo; every response carries the dashboard deep link to the live thread. name: Workers - description: Service health checks. name: Health paths: /v1/spans: get: tags: - Spans summary: List spans description: >- Query spans across all traces. Supports filtering by type, status, model, name, and duration range. operationId: list-spans parameters: - in: query name: limit required: false schema: default: 100 maximum: 500 minimum: 1 type: integer - in: query name: offset required: false schema: default: 0 minimum: 0 nullable: true type: integer - in: query name: trace_id required: false schema: type: string - in: query name: type required: false schema: enum: - SPAN - GENERATION - EVENT type: string - in: query name: status required: false schema: enum: - UNSET - OK - ERROR type: string - in: query name: name required: false schema: type: string - in: query name: model required: false schema: type: string - in: query name: min_duration required: false schema: minimum: 0 nullable: true type: integer - in: query name: max_duration required: false schema: minimum: 0 nullable: true type: integer - in: query name: start_date required: false schema: format: date-time type: string - in: query name: end_date required: false schema: format: date-time type: string - in: query name: user_id required: false schema: type: string - in: query name: session_id required: false schema: type: string - description: >- Filter expression (string DSL), same grammar as GET /v1/traces. Clauses combined with `and`; a clause is a predicate (`field operator [value]`) or a parenthesized OR-group: `(a = 1 or b = 2)`. Supports `metadata.` with `exists` / `does not exist` / `=` / string operators. Example: `(model = "gpt-4o" or model = "o3") and status = ERROR`. Malformed filters return 400. in: query name: filter required: false schema: description: >- Filter expression (string DSL), same grammar as GET /v1/traces. Clauses combined with `and`; a clause is a predicate (`field operator [value]`) or a parenthesized OR-group: `(a = 1 or b = 2)`. Supports `metadata.` with `exists` / `does not exist` / `=` / string operators. Example: `(model = "gpt-4o" or model = "o3") and status = ERROR`. Malformed filters return 400. type: string responses: '200': content: application/json: schema: properties: data: items: properties: cost: type: number duration_ms: type: number id: type: string input_tokens: minimum: 0 type: integer metadata: additionalProperties: type: string type: object model: nullable: true type: string name: type: string output_tokens: minimum: 0 type: integer parent_id: nullable: true type: string prompt_name: nullable: true type: string service_name: type: string span_kind: type: string status: enum: - UNSET - OK - ERROR type: string status_message: type: string timestamp: format: date-time type: string tokens: minimum: 0 type: integer trace_id: type: string type: type: string required: - id - trace_id - parent_id - name - status - status_message - duration_ms - timestamp - type - model - input_tokens - output_tokens - tokens - cost - span_kind - service_name - prompt_name - metadata type: object type: array pagination: properties: limit: minimum: 0 type: integer offset: minimum: 0 type: integer total: minimum: 0 type: integer required: - total - limit - offset type: object required: - data - pagination type: object description: A list of spans. '400': content: application/json: schema: properties: error: properties: code: type: string message: type: string required: - code - message type: object required: - error type: object description: Invalid query parameters. '401': content: application/json: schema: properties: error: properties: code: type: string message: type: string required: - code - message type: object required: - error type: object description: Missing or invalid API key. '429': content: application/json: schema: properties: error: properties: code: type: string message: type: string required: - code - message type: object required: - error type: object description: Rate limited. components: securitySchemes: AppId: description: >- Application ID for tenant scoping. X-Outerlayer-App-Id is accepted as an equivalent header. in: header name: X-Agentmark-App-Id type: apiKey BearerAuth: description: API key (sk_agentmark_*) scheme: bearer type: http ````