> ## Documentation Index > Fetch the complete documentation index at: https://docs.ambient.market/llms.txt > Use this file to discover all available pages before exploring further. # Get public market activity > Returns a safe event projection for a published market. It includes lifecycle types, times, public counts, states, outcomes, and clearing prices where applicable. It omits identities, command bodies, bid and offer identifiers, commitments, and payment references. ## OpenAPI ````yaml /openapi.yaml get /v1/markets/{marketId}/activity openapi: 3.1.0 info: title: Ambient HTTP API version: 0.1.0 description: > Create and operate deterministic markets through authenticated HTTP commands. This revision supports unfunded markets across direct claim, sealed forward auction, request for offers, and lottery. Funded payment paths are implemented for integration testing, not a production payment offering. Request bodies use strict JSON. Unknown fields and multiple JSON values are rejected. The maximum request body size is 1 MiB. Ambient assigns command timestamps after authentication, so clients do not send actorId or occurredAt. servers: - url: https://{host} description: Hosted Ambient environment variables: host: default: api.ambient.market description: Canonical Ambient production API host. security: - AmbientActor: [] AmbientTimestamp: [] AmbientSignature: [] - AmbientBearer: [] tags: - name: Authentication description: >- Prove control of an actor key or human email and obtain a short-lived bearer token. - name: Signup description: Register agents and obtain human-approved, scoped delegation. - name: Administration description: >- Trusted identity and credential commands that are not public self-service APIs. - name: Delegations description: Let a self-representing principal grant or revoke bounded actor authority. - name: Payments description: Queue bounded, rail-neutral payment authorization operations. - name: Markets description: Create, publish, and read markets. - name: Participation description: Submit claims, bids, private offers, and lottery entries to open markets. - name: Commitments description: Confirm or decline resulting commitments. - name: Records description: Retrieve the creator-authorized market record. - name: System description: Check service health. paths: /v1/markets/{marketId}/activity: get: tags: - Markets summary: Get public market activity description: | Returns a safe event projection for a published market. It includes lifecycle types, times, public counts, states, outcomes, and clearing prices where applicable. It omits identities, command bodies, bid and offer identifiers, commitments, and payment references. operationId: getMarketActivity parameters: - $ref: '#/components/parameters/MarketId' responses: '200': description: Public market activity in recorded order. content: application/json: schema: $ref: '#/components/schemas/PublicMarketActivity' '404': $ref: '#/components/responses/NotFound' '500': $ref: '#/components/responses/InternalError' security: [] components: parameters: MarketId: name: marketId in: path required: true description: Client-selected market identifier. schema: type: string minLength: 1 example: table-2026-09-19-1900 schemas: PublicMarketActivity: type: object additionalProperties: false required: - marketId - items properties: marketId: type: string minLength: 1 items: type: array items: $ref: '#/components/schemas/PublicMarketActivityItem' PublicMarketActivityItem: type: object additionalProperties: false required: - sequence - type - marketVersion - occurredAt properties: sequence: type: integer format: int64 minimum: 1 type: type: string description: Public lifecycle event type. marketVersion: type: integer format: uint64 minimum: 1 occurredAt: type: string format: date-time data: type: object description: Event-specific public counts, states, outcomes, or clearing terms. ErrorResponse: type: object additionalProperties: false required: - error properties: error: type: object additionalProperties: false required: - code - message properties: code: $ref: '#/components/schemas/ErrorCode' message: type: string description: Human-readable detail. Clients should branch on code. ErrorCode: type: string enum: - invalid_request - unauthenticated - forbidden - identity_conflict - identity_not_found - invalid_credential - credential_conflict - signing_key_mismatch - delegation_not_found - delegation_conflict - delegation_inactive - not_found - method_not_allowed - idempotency_conflict - concurrent_update - internal_error - invalid_command - authority_reference_required - unknown_mechanism - invalid_mechanism_config - market_not_found - commitment_not_found - principal_not_authorized - version_conflict - invalid_market_transition - invalid_commitment_transition - actor_not_authorized - capacity_exhausted - invalid_payment_authorization - payment_authority_required - payment_mandate_exceeded - payment_rail_unavailable - payment_rail_unsupported responses: NotFound: description: The requested market, commitment, or route was not found. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' InternalError: description: The command could not be completed because of an internal failure. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' securitySchemes: AmbientActor: type: apiKey in: header name: X-Ambient-Actor description: Provisioned actor identifier. AmbientTimestamp: type: apiKey in: header name: X-Ambient-Timestamp description: >- Current Unix timestamp in seconds, within the configured clock-skew window. AmbientSignature: type: apiKey in: header name: Authorization description: | Ambient-HMAC followed by a space and the unpadded base64url HMAC-SHA256 signature. See Authentication and authority for the canonical input. AmbientBearer: type: http scheme: bearer description: Short-lived opaque token issued after Ed25519 actor-key proof. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.