> ## Documentation Index > Fetch the complete documentation index at: https://docs.mnemom.ai/llms.txt > Use this file to discover all available pages before exploring further. # Stream webhook events for an org over Server-Sent Events > Opens a Server-Sent Events stream that emits webhook events delivered to the org in near-real-time. ## OpenAPI ````yaml GET /orgs/{org_id}/webhooks/listen openapi: 3.1.0 info: title: Mnemom API description: >- Trust infrastructure for AI agents. Transparent alignment verification, behavioral drift detection, and accountability primitives. version: 1.0.0 contact: name: Mnemom url: https://mnemom.ai email: support@mnemom.ai license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0 servers: - url: https://api.mnemom.ai/v1 description: Production security: - BearerAuth: [] - ApiKeyAuth: [] tags: - name: A2A description: >- Public A2A AgentCard projection of the canonical alignment card, with embedded AAP attestation extension (cards-as-primitive Phase 5). - name: Agents description: Agent registration, lifecycle, and metadata. - name: Agent Containment description: Containment policies and quarantine controls. - name: Alignment description: >- Alignment manifest CRUD — canonical `/v1/alignment//` surface across platform / org / team / agent (cards-as-primitive Phase 4). - name: Analyze description: Behavioral analysis endpoints. - name: Attestation description: >- AAP attestation token JWKS surface and platform-admin signing-key rotation (cards-as-primitive Phase 5). - name: Auth description: Authentication, sessions, and access management. - name: Billing description: Subscription, usage, and invoicing. - name: Blog description: Public blog content. - name: Card Templates description: Org-level alignment and protection card templates. - name: Catalog description: >- Discovery surface for the 25-entry Mnemom value catalog v1 (cards-as-primitive Phase 4). - name: Checkpoints description: Integrity checkpoints and proof artifacts. - name: Conscience Values description: Org-level conscience-value configuration. - name: Drift description: Drift detection and resolution. - name: Enforcement description: Enforcement-mode configuration and queries. - name: Governance description: Operator-actionable governance signals (ADR-048). - name: Integrity description: AIP integrity checkpoints and verdicts. - name: Intelligence description: Intelligence reports and queries. - name: Licensing description: License management. - name: Network description: >- Protection Network L4 thermometer read surface. Public-aggregate disclosure: any authenticated principal may read; rows carry no per-tenant identifiers. - name: OAuth description: >- OAuth 2.1 authorization-code + PKCE flow for MCP clients (MNE-328). Identity delegated to Supabase GoTrue; mnemom-api mints its own short-lived MCP-scoped tokens. Includes RFC 7591 dynamic client registration and RFC 7009 revocation. - name: On-Chain description: On-chain verification and proofs. - name: Organizations description: Org-level resources and management. - name: Policy description: Policy evaluation and configuration. - name: Postures description: Trust posture management (ADR-045). - name: Protection description: >- Protection manifest CRUD — canonical `/v1/protection//` surface across platform / org / team / agent (cards-as-primitive Phase 4). - name: Recipes description: >- Customer-facing detection-recipe surface — FN/FP reports. Distinct from the Admin recipe-promotion surface and the Internal seeding surface. - name: Reclassification description: Reclassification workflows. - name: Reputation description: Per-agent reputation scores. - name: Risk description: Risk assessment endpoints. - name: Safe House description: Safe House threat detection and quarantine. - name: Sideband description: Sideband detection queries (legacy; sunsetting). - name: Team Reputation description: Team-level reputation aggregates. - name: Teams description: Team-scope resources. - name: Tools description: >- Mnemom-side tools registry — per-tool class+domain+schema metadata (cards-as-primitive Phase 4). - name: Traces description: AP-Trace artifacts and queries. - name: Transparency description: >- Append-only public log of every canonical card identity ever composed. Signed Merkle root + per-row inclusion proofs (cards-as-primitive Phase 5). - name: Trust description: >- Protection Network L5 public-trust surface — security advisories, IoC feed (STIX 2.1), and platform-admin CMS for both. - name: Verification description: Trace verification endpoints. - name: Webhook Notifications description: Webhook event subscription management. - name: Webhooks description: Webhook delivery and lifecycle. - name: Misc description: >- Miscellaneous operator-facing endpoints (contact, enterprise inquiries, compliance). - name: Notifications description: >- Reactive notification channels — SSE stream + signed-webhook subscriptions for canonical card changes (cards-as-primitive Phase 5). paths: /orgs/{org_id}/webhooks/listen: get: tags: - Webhook Notifications summary: Stream webhook events for an org over Server-Sent Events description: >- Opens a Server-Sent Events stream that emits webhook events delivered to the org in near-real-time. Requires the `webhook_notifications` feature flag and owner/admin role on the target org. The cursor is resolved from the `since` query parameter, falling back to the `Last-Event-ID` header when `since` is absent — clients reconnecting after a drop should send the last event id they observed. The stream caps at 5 minutes per connection, polls the underlying queue every 1 second, and emits a keepalive comment every 15 seconds. Frame types emitted on the stream: - `ready` — sent immediately after the stream opens, carries the resolved cursor. - `webhook.event` — one frame per webhook event, payload mirrors the event record. - keepalive — SSE comment line (`:keepalive`) every 15s to keep intermediaries from idling the connection. - `close` — sent when the 5-minute cap is reached, before the server closes the socket. - `error` — sent on unrecoverable stream errors before the socket closes. operationId: listenWebhookEvents parameters: - $ref: '#/components/parameters/OrgId' - name: since in: query required: false description: >- Cursor (event id) to resume from. When omitted, the server falls back to the `Last-Event-ID` request header; when neither is supplied, the stream starts at the current tail. schema: type: string - name: Last-Event-ID in: header required: false description: >- Standard SSE reconnection header. Used as the cursor when the `since` query parameter is not supplied. schema: type: string responses: '200': description: >- Server-Sent Events stream of webhook events. The connection is capped at 5 minutes; clients should reconnect and resume via `Last-Event-ID` or `since`. headers: Cache-Control: description: Disables intermediary caching of the stream. schema: type: string enum: - no-cache X-Accel-Buffering: description: >- Disables proxy response buffering (nginx-family) so frames flush immediately. schema: type: string enum: - 'no' Connection: description: >- Keeps the underlying TCP connection open for the duration of the stream. schema: type: string enum: - keep-alive content: text/event-stream: schema: type: string description: >- Sequence of SSE frames. Each non-keepalive frame has an `event:` line naming the frame type (`ready`, `webhook.event`, `close`, `error`), an `id:` line carrying the event cursor (for `webhook.event` frames), and a `data:` line containing a JSON payload. Keepalive frames are SSE comments (`:keepalive`). '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' '503': $ref: '#/components/responses/ServiceUnavailable' security: - BearerAuth: [] components: parameters: OrgId: name: org_id in: path required: true schema: type: string description: Organization identifier (e.g. org-abc12345) responses: BadRequest: description: Bad request content: application/json: schema: $ref: '#/components/schemas/Error' Unauthorized: description: Authentication required content: application/json: schema: $ref: '#/components/schemas/Error' Forbidden: description: Forbidden content: application/json: schema: $ref: '#/components/schemas/Error' NotFound: description: Resource not found content: application/json: schema: $ref: '#/components/schemas/Error' TooManyRequests: description: >- Rate-limit exceeded. The global per-IP limiter (100 requests/minute, applied to every `/v1/*` route) rejected this request. Back off until the window resets — `Retry-After` carries the cooldown in seconds and `X-RateLimit-Reset` the absolute reset time. headers: Retry-After: description: Seconds to wait before retrying. schema: type: integer minimum: 1 X-RateLimit-Limit: description: Requests permitted per window. schema: type: integer X-RateLimit-Remaining: description: Requests remaining in the current window (0 on a 429). schema: type: integer minimum: 0 X-RateLimit-Reset: description: Unix epoch seconds at which the current window resets. schema: type: integer content: application/json: schema: $ref: '#/components/schemas/Error' InternalServerError: description: >- Server error — request was well-formed but the server failed to fulfill it. Typically a downstream dependency (DB / RPC / external API) returned an unexpected error. content: application/json: schema: $ref: '#/components/schemas/Error' ServiceUnavailable: description: >- An upstream dependency is currently unavailable. The request was not processed; retry after the cooldown window. content: application/json: schema: $ref: '#/components/schemas/Error' schemas: Error: type: object description: >- Canonical error envelope (ADR-API-001 conv 1). `error` is always an object — never a bare string. Every 4xx/5xx response across the API conforms to this shape; the runtime helper is `src/http-errors.ts::buildErrorBody`. required: - error properties: error: type: object required: - code - message properties: code: type: string pattern: ^[a-z][a-z0-9_]*$ description: >- Stable, machine-matchable failure identifier (lowercase snake_case). Clients may branch on this; the string is part of the contract. **Status-class defaults** — emitted when no caller code is supplied (`errorCodeForStatus(status)`): `bad_request` (400), `unauthorized` (401), `forbidden` (403), `not_found` (404), `method_not_allowed` (405), `conflict` (409), `gone` (410), `precondition_failed` (412), `payload_too_large` (413), `unsupported_media_type` (415), `unprocessable_entity` (422), `precondition_required` (428), `rate_limited` (429), `internal_error` (500), `not_implemented` (501), `bad_gateway` (502), `service_unavailable` (503), `gateway_timeout` (504). Fallback `error` for unmapped statuses. **Caller-supplied codes** — handlers may pass an explicit `code` for a specific failure class. Examples: `agent_not_found`, `invalid_hash_proof`, `already_linked`, `idempotency_conflict`, `feature_gated`, `schema_validation_failed`, `no_token`, `bad_canonical_payload`. **Care-framed sub-resource codes** — the cards-as-primitive surface passes its stable care code-string straight through as `error.code`. Examples: `if_match_absent`, `if_match_stale`, `if_match_malformed`, `primitive_validation_failed`. message: type: string description: Human-readable, care-framed explanation of the failure. details: description: >- Optional structured context for the failure (any JSON value: object, array, or primitive). Common shapes: validation findings list, idempotency-conflict diff, `{presented_etag, current_etag}` on a stale `If-Match`, etc. Mirrors the helper's `details?: unknown`. securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT description: 'Supabase JWT token in Authorization: Bearer header' ApiKeyAuth: type: apiKey in: header name: X-Mnemom-Api-Key description: Mnemom API key (mnm_... format) ````