> ## Documentation Index > Fetch the complete documentation index at: https://docs.surfais.com/llms.txt > Use this file to discover all available pages before exploring further. # List cited sources > Cited domains over a window. Citations aggregated over the own brand's finalised run units in the window (unit grain), enriched with the brand's latest opportunity score and classification for the domain: `category` and `influenceability` are RELATIVE TO THIS OWN BRAND, read from its latest source action for the domain, and null for a domain the brand has no action for — never the global dictionary (a sibling own brand's domain is `owned` there but `other` here, with influenceability `competitor-owned`). Ordered by `citation_count` desc, then `domain` asc in code-point order (plain string comparison of the lower-cased domain, not locale collation) — the cursor continues from exactly that tuple. The aggregate is computed per request over every unit in the window, so the span is capped at 90 days (400 `validation_error`, `details[].code = "window_too_wide"` beyond it). Pages are consistent within one scan generation only: the cursor is anchored to the brand's change token (`last_scan_changed_at`), and once a scan finalises between pages the next page is 400 `invalid_cursor` with `details.reason = "stale"` — restart from the first page. The token is checked again after the aggregate is computed: if it moved, the aggregate is recomputed once, and if it moved again the answer is 409 `scan_in_progress` with `Retry-After` (5s) — units are finalising faster than they can be summed, so expect it while a scan runs. It is checked once more after the per-domain enrichment (the brand's latest source actions and the classification): replacing a brand's source actions moves the token too, so a move there is 409 on a first page and 400 `invalid_cursor` (stale) under a cursor — every field of a page belongs to one generation. Captured forward-only from 2026-08-19. Own brands only. ## OpenAPI ````yaml /api-reference/openapi.json get /orgs/{orgId}/brands/{brandId}/sources openapi: 3.1.0 info: title: Surfais API version: 1.0.0 description: >- The Surfais API gives programmatic access to the AI-visibility data Surfais measures for your brands: organisations, brands and competitors, tracked prompts, per-run results and mentions, scores, share of voice and cited sources. It can also provision brands, manage prompts and competitors, request on-demand scans, and deliver signed webhooks when a scan completes or a score or sentiment threshold is crossed. Base URL: `https://api.surfais.com/v1`. Send your API key as a Bearer token (`Authorization: Bearer sfs_live_…`). Test keys (`sfs_test_…`) are rejected by the production API. Requests and responses are JSON: a success is `{ "data": … }`, an error is `{ "error": { "code", "message" }, "request_id" }`. Guides for authentication, pagination, errors, rate limits, idempotency and webhooks are at https://docs.surfais.com/api/introduction. contact: name: Surfais support email: support@surfais.com url: https://docs.surfais.com/api/support servers: - url: https://api.surfais.com/v1 description: >- Production (the `/v1` prefix is part of the server URL; paths below are relative to it). security: - bearerKey: [] tags: - name: orgs description: Organisations reachable by the key, their usage, and the partner link. - name: brands description: Own brands (properties) and competitor rows. - name: prompts description: 'Tracked prompts: reads, CRUD and the declarative sync.' - name: results description: Finalised run-level data. - name: scores description: Persisted scores, per-market history and share of voice. - name: sources description: Cited domains. - name: scans description: On-demand scan requests. - name: webhooks description: >- Outbound event delivery: endpoints, subscriptions, deliveries (partner keys). externalDocs: description: Guides, concepts and webhooks url: https://docs.surfais.com/api/introduction paths: /orgs/{orgId}/brands/{brandId}/sources: get: tags: - sources summary: List cited sources description: >- Cited domains over a window. Citations aggregated over the own brand's finalised run units in the window (unit grain), enriched with the brand's latest opportunity score and classification for the domain: `category` and `influenceability` are RELATIVE TO THIS OWN BRAND, read from its latest source action for the domain, and null for a domain the brand has no action for — never the global dictionary (a sibling own brand's domain is `owned` there but `other` here, with influenceability `competitor-owned`). Ordered by `citation_count` desc, then `domain` asc in code-point order (plain string comparison of the lower-cased domain, not locale collation) — the cursor continues from exactly that tuple. The aggregate is computed per request over every unit in the window, so the span is capped at 90 days (400 `validation_error`, `details[].code = "window_too_wide"` beyond it). Pages are consistent within one scan generation only: the cursor is anchored to the brand's change token (`last_scan_changed_at`), and once a scan finalises between pages the next page is 400 `invalid_cursor` with `details.reason = "stale"` — restart from the first page. The token is checked again after the aggregate is computed: if it moved, the aggregate is recomputed once, and if it moved again the answer is 409 `scan_in_progress` with `Retry-After` (5s) — units are finalising faster than they can be summed, so expect it while a scan runs. It is checked once more after the per-domain enrichment (the brand's latest source actions and the classification): replacing a brand's source actions moves the token too, so a move there is 409 on a first page and 400 `invalid_cursor` (stale) under a cursor — every field of a page belongs to one generation. Captured forward-only from 2026-08-19. Own brands only. operationId: listBrandSources parameters: - in: path name: orgId schema: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ description: >- Organisation id. Org keys: the key's own org. Partner keys: any org with an active link. Anything else is 404. required: true description: >- Organisation id. Org keys: the key's own org. Partner keys: any org with an active link. Anything else is 404. - in: path name: brandId schema: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ description: >- Brand id within the org (own brand or competitor row); 404 when not in the org. Writes that add tracking need an own (400 `validation_error` with `details[].code = "own_brand_only"`), non-archived (409 `brand_archived`) brand. required: true description: >- Brand id within the org (own brand or competitor row); 404 when not in the org. Writes that add tracking need an own (400 `validation_error` with `details[].code = "own_brand_only"`), non-archived (409 `brand_archived`) brand. - in: query name: limit schema: default: 50 description: Page size (1–200). Default 50. type: integer minimum: 1 maximum: 200 description: Page size (1–200). Default 50. - in: query name: cursor schema: description: >- Opaque cursor from a previous page's `pagination.next_cursor`. It pins the walk — its sort anchor, the resolved date window and the FILTERS the first page ran under — so continue with the cursor alone: omitted filters are restored from it. Naming a different value for one of them is 400 `invalid_cursor` (`details.reason = "filter_changed"`, `details.parameter` the one that differs); start again from the first page to change a filter. type: string maxLength: 2048 description: >- Opaque cursor from a previous page's `pagination.next_cursor`. It pins the walk — its sort anchor, the resolved date window and the FILTERS the first page ran under — so continue with the cursor alone: omitted filters are restored from it. Naming a different value for one of them is 400 `invalid_cursor` (`details.reason = "filter_changed"`, `details.parameter` the one that differs); start again from the first page to change a filter. - in: query name: from schema: description: 'Window start (inclusive). Default: `to` minus 30 days.' type: string pattern: ^\d{4}-\d{2}-\d{2}$ format: date description: 'Window start (inclusive). Default: `to` minus 30 days.' - in: query name: to schema: description: >- Window end (inclusive). Default: today (UTC). Max span 90 days; `from` after `to` is 400 `validation_error`. On a paginated endpoint the resolved window is pinned by the first page and carried in the cursor — continue with the cursor alone; naming a different `from`/`to` on a continuation is 400 `invalid_cursor` (`details.reason = "window_changed"`). type: string pattern: ^\d{4}-\d{2}-\d{2}$ format: date description: >- Window end (inclusive). Default: today (UTC). Max span 90 days; `from` after `to` is 400 `validation_error`. On a paginated endpoint the resolved window is pinned by the first page and carried in the cursor — continue with the cursor alone; naming a different `from`/`to` on a continuation is 400 `invalid_cursor` (`details.reason = "window_changed"`). responses: '200': description: Source domains. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: type: object properties: data: type: array items: $ref: '#/components/schemas/Source' pagination: $ref: '#/components/schemas/Pagination' required: - data - pagination '400': description: >- `body_not_allowed` — a GET or HEAD that declared a body, refused by the intake guard BEFORE the parser, which is the only 400 a read operation reaches by that route — or `validation_error` (with `details`), `invalid_cursor`, `invalid_json` or `invalid_body`, the last two reachable only where a body is accepted at all. All are raised after authentication and the minute charge (the body is parsed only for an authenticated, admitted request), so every 400 carries the `X-RateLimit-*` trio and is metered. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '401': description: '`invalid_api_key` — uniform for every authentication failure.' headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '403': description: >- `tier_not_entitled` — the org key's organisation left an API-entitled tier. The request is charged to the key's minute allowance (so it carries the `X-RateLimit-*` trio, and an exhausted allowance answers 429 first) and is metered. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '404': description: >- `not_found` — the org is not reachable by this key or a nested id is not in it. Raised after authentication and the minute charge, so it carries the `X-RateLimit-*` trio and is metered. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '409': description: >- `scan_in_progress` — the brand's change token moved during the aggregate and again on its one retry; retry after `Retry-After` (5s). headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. Retry-After: required: true description: Seconds to wait before retrying — present on every 429 and 503. schema: type: string description: >- Seconds to wait before retrying — present on every 429 and 503. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '413': description: >- `payload_too_large` — a JSON body over 1 MB. The body is parsed only for an authenticated, admitted request, so this carries the `X-RateLimit-*` trio and is metered. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '429': description: >- `rate_limited` (per-minute limit, or too many failed authentications from this address) or `quota_exceeded`. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. Retry-After: required: true description: Seconds to wait before retrying — present on every 429 and 503. schema: type: string description: >- Seconds to wait before retrying — present on every 429 and 503. X-RateLimit-Limit: required: true description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. schema: type: string description: >- Requests allowed per minute for this key. On a 429 `rate_limited` from the failed-authentication gate: failed attempts allowed per minute for the client address. X-RateLimit-Remaining: required: true description: >- Requests left in the current minute window (0 on the failed-authentication 429). schema: type: string description: >- Requests left in the current minute window (0 on the failed-authentication 429). X-RateLimit-Reset: required: true description: Unix seconds at which the current minute window ends. schema: type: string description: Unix seconds at which the current minute window ends. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '500': description: >- `internal_error` — quote `request_id`. A failure inside a route answers after the minute charge and carries the `X-RateLimit-*` trio; a failure before the limiter carries only `X-Request-Id`. headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. X-RateLimit-Limit: description: >- Present when the failure occurred after the minute charge (inside a route); absent on a failure before the limiter. Requests allowed per minute for this key. schema: description: >- Present when the failure occurred after the minute charge (inside a route); absent on a failure before the limiter. Requests allowed per minute for this key. type: string X-RateLimit-Remaining: description: >- Present when the failure occurred after the minute charge. Requests left in the current minute window. schema: description: >- Present when the failure occurred after the minute charge. Requests left in the current minute window. type: string X-RateLimit-Reset: description: >- Present when the failure occurred after the minute charge. Unix seconds at which the current minute window ends. schema: description: >- Present when the failure occurred after the minute charge. Unix seconds at which the current minute window ends. type: string content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '503': description: >- `api_unavailable` (switched off; `Retry-After` is 60), `rate_limit_unavailable` (fail-closed limiter — its store, or a saturated failed-authentication gate; before the minute charge, so no `X-RateLimit-*` trio), or `store_unavailable` (a tenant-store call behind an authenticated request exceeded 15000 ms — raised after the minute charge, so it is counted and carries the trio). headers: X-Request-Id: required: true description: >- Correlation id for this request; equals `request_id` in an error envelope. schema: type: string description: >- Correlation id for this request; equals `request_id` in an error envelope. Retry-After: required: true description: Seconds to wait before retrying — present on every 429 and 503. schema: type: string description: >- Seconds to wait before retrying — present on every 429 and 503. X-RateLimit-Limit: description: >- Present when the failure occurred after the minute charge (inside a route); absent on a failure before the limiter. Requests allowed per minute for this key. schema: description: >- Present when the failure occurred after the minute charge (inside a route); absent on a failure before the limiter. Requests allowed per minute for this key. type: string X-RateLimit-Remaining: description: >- Present when the failure occurred after the minute charge. Requests left in the current minute window. schema: description: >- Present when the failure occurred after the minute charge. Requests left in the current minute window. type: string X-RateLimit-Reset: description: >- Present when the failure occurred after the minute charge. Unix seconds at which the current minute window ends. schema: description: >- Present when the failure occurred after the minute charge. Unix seconds at which the current minute window ends. type: string content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' components: schemas: Source: type: object properties: domain: type: string description: >- Cited hostname as captured, lower-cased (no scheme, `www.`, port or path) and bounded to 253 bytes. An OPAQUE value, not a validated DNS name: an underscored label or a bracketed IPv6 literal passes through as the answer cited it — treat it as a key, not as something to resolve. citation_count: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: >- Citations of this domain across the brand's finalised runs in the window (unit grain). cited_rate: anyOf: - type: number - type: 'null' description: >- % of those citations attributed in the answer (`cited = true`), over the citations whose attribution is known; null when none is known. category: anyOf: - type: string - type: 'null' description: >- owned | editorial | ugc | reference | other — RELATIVE TO THIS OWN BRAND, from the brand's latest source action for the domain (`owned` means this brand's own estate; a sibling own brand's domain reads `other`). Null for a domain this brand never ranked: the global dictionary is not consulted, because it changes outside the brand's scan generation and a walk must not mix two of its states. Both fields belong to the page's generation — a source-actions replacement moves the brand's change token. influenceability: anyOf: - type: string - type: 'null' description: >- Same source and rule as `category`: the brand-relative value on the latest action row — null when the dictionary had not assessed the domain when the brand was ranked — and null for a domain this brand never ranked. opportunity_score: anyOf: - type: integer minimum: -9007199254740991 maximum: 9007199254740991 - type: 'null' description: >- Opportunity score (1–3) from the brand's latest batch of source actions for this domain. required: - domain - citation_count - cited_rate - category - influenceability - opportunity_score Pagination: type: object properties: next_cursor: anyOf: - type: string - type: 'null' description: Opaque cursor for the next page; null on the last page. has_more: type: boolean required: - next_cursor - has_more ErrorEnvelope: type: object properties: error: type: object properties: code: type: string description: Stable machine code — see the error list in the description. message: type: string details: {} required: - code - message request_id: type: string description: Echoed in the `X-Request-Id` header. required: - error - request_id securitySchemes: bearerKey: type: http scheme: bearer bearerFormat: sfs_live_… / sfs_test_… description: >- A Surfais API key — an organisation key or a partner key. Issued by Surfais; shown once. Rotate by creating a new key, then revoking the old one. ````