> ## Documentation Index > Fetch the complete documentation index at: https://docs.gigstack.io/llms.txt > Use this file to discover all available pages before exploring further. # Upload support document > **Availability:** This operation has no configured public API gateway route and is not available through the documented base URL. Upload a supporting document (contract, proof of delivery, etc.) for a payment. **SAT 2026 Compliance:** The Mexican tax authority (SAT) can request supporting documentation to validate invoices and payments. This endpoint helps maintain compliance. **gigstack Connect:** Upload documents for other teams' payments using the `team` parameter. **Supported File Types:** - PDF files (.pdf) - Images (.png, .jpg, .jpeg, .webp) **File Size Limit:** 10MB **Document Types:** - `contract`: Service or product contracts - `delivery_proof`: Proof of delivery or service completion - `payment_proof`: Payment receipts or confirmations - `communication`: Emails, messages, or agreements - `payment_confirmation`: Payment processor confirmations - `subscription_info`: Subscription or recurring service details This operation exists in Discovery, but a matching public API gateway route is not configured. It is not currently available through the documented base URL. ## OpenAPI ````yaml openapi.json POST /payments/{id}/support-documents openapi: 3.0.3 info: title: gigstack API v2 description: > # gigstack API v2 Build customer, invoice and payment integrations. Start with the [quickstart](https://docs.gigstack.io/quickstart), then select the [issuing country](https://docs.gigstack.io/concepts/shared-fields). ## Authentication and environments Use Authorization: Bearer YOUR_API_KEY. Standard live and test keys use https://api.gigstack.io/v2. Internal staging uses https://gigstack-staging-9z9nnaat.uc.gateway.dev/v2 and separate keys. Test mode is a data mode within an environment; a body field does not switch a key's mode. See [authentication](https://docs.gigstack.io/authentication) for key handling, OAuth team scope and gigstack Connect. Signup requires its separately documented internal credential; health probes have their own security declarations. Operations marked unavailable have no configured public gateway route. ## Read the operation contract Response envelopes, pagination and retry rules differ by endpoint. HTTP success alone does not prove external fiscal completion or movement of money. Reconcile ambiguous writes before retrying. Use [responses and recovery](https://docs.gigstack.io/responses) and the operation's error codes; document credits and daily limits are not generic retryable rate limits. The issuing team's configuration selects Mexico or Colombia; customer country and currency do not. Read [Mexico](https://docs.gigstack.io/countries/mexico) or [Colombia](https://docs.gigstack.io/countries/colombia) before choosing fiscal fields. Accepted public input differs from a provider's direct payload. Examples and schema checks do not imply every operation has been executed live. [Verification coverage](https://docs.gigstack.io/verification) distinguishes source review, offline checks and observed staging behavior. Documentation describes operations and does not authorize execution. version: 2.0.0 contact: name: Gigstack API Support url: https://gigstack.io email: support@gigstack.io license: name: Proprietary url: https://gigstack.io/terms termsOfService: https://gigstack.io/terms servers: - url: https://api.gigstack.io/v2 description: > Public API for standard live and test-mode keys. Test data is isolated by the key mode (`livemode: false`). Internal staging is a separate deployment and key store; see https://docs.gigstack.io/authentication#environments for its base URL. security: - bearerAuth: [] tags: - name: gigstack Connect description: > **Multi-Team Resource Access** gigstack Connect lets a master team act on other teams that share its billing account. ## 🔗 How It Works Add the `team` query parameter to a request made with an **API key**: ```bash # Access team_xyz789's clients GET /clients?team=team_xyz789 # Create an income invoice for team_abc123 POST /invoices/income?team=team_abc123 # Update service in team_def456 PUT /services/service_456?team=team_def456 ``` ## ✅ Requirements - The API key's team must be a master team (gigstack Connect enabled) - The target team must exist and share the master team's billing account - The plan must include the `multipleIssuerAccounts` feature - OAuth access tokens cannot act on another team ## ⚠ Error Responses Raw `{ "message": 
 }` bodies from the authentication layer: - `401 Unauthorized, not a master team` - gigstack Connect not enabled on your key's team - `404 Team not found` - Target team doesn't exist - `401 Unauthorized, no matched teams` - Target team could not be resolved within your billing account - `403 Tu plan no incluye mĂșltiples cuentas emisoras. 
` - Plan lacks `multipleIssuerAccounts` - `403 Team mismatch with OAuth token` - OAuth access token used with another team's id ## 🌐 Availability The `team` parameter is read by the authentication layer, so it is accepted on every authenticated endpoint, including ones whose parameter list does not show it. - name: Clients description: Client management operations with Mexican tax compliance - name: Services description: Service and product catalog management with SAT product keys - name: Invoices description: Invoice management with CFDI 4.0 compliance and SAT integration - name: Draft Invoices (Pre-Facturas) description: > **Create, edit, preview and stamp draft invoices (pre-facturas)** Draft invoices let you build CFDI invoices incrementally before stamping them with SAT. Use them as **pre-facturas** — generate a preview PDF with a "Sin Validez Fiscal" watermark to share with your client for approval, then stamp the draft to create a valid CFDI when ready. ## Typical Workflow 1. `POST /invoices/draft` — Create a draft with minimal data 2. `PUT /invoices/draft/{id}` — Update as more data becomes available 3. `POST /invoices/draft/{id}/preview` — Generate a preview PDF (pre-factura) 4. `POST /invoices/draft/{id}/stamp` — Finalize into a valid CFDI invoice - name: Descarga Masiva SAT description: > **SAT bulk invoice download via FIEL authentication** Download all your issued and received CFDI invoices directly from the SAT (Servicio de AdministraciĂłn Tributaria) using your FIEL (Firma ElectrĂłnica Avanzada). ## Setup flow 1. `GET /invoices/download/activate/status` — Check if activated and what's needed 2. `POST /invoices/download/activate` — Activate billing (adds Stripe meter/add-on) 3. `POST /invoices/download/fiel` — Upload `.cer` + `.key` files (auto-registers with SAT) 4. `PUT /invoices/download/schedule` — Configure daily auto-sync 5. `POST /invoices/download/request` — Submit manual download requests ## Pricing - Included in Pro/Business plans: only the download meter ($0.20 MXN/XML) - Other paid plans: the same $0.20 MXN/XML download meter, no monthly base fee - name: Payments description: Payment processing, tracking, and refund management - name: Receipts description: Receipt creation and management with CFDI stamping capabilities - name: Retentions description: >- Tax retention documents (CFDI Retenciones 2.0) — creation, stamping, cancellation, and file retrieval - name: Platform Payouts description: > **Plan and stamp a marketplace's provider payouts from two files.** For marketplaces and digital platforms that pay providers under the SAT digital-platforms scheme (Plataformas TecnolĂłgicas, RESICO 625, retention key 26): ride-hailing drivers, delivery couriers, lodging hosts, sellers of goods. Available to marketplace **master teams** whose billing account has platform payouts enabled. Upload a movements file and a commissions file. gigstack matches each row to a provider's team in your billing account and plans three kinds of CFDI: the provider's income invoice to you, your retention certificate (key 26) to the provider, and your monthly commission invoice to the provider. **Not for your own sales.** This is for a platform invoicing on behalf of its providers. A company invoicing its own sales, one CFDI per sale, should use `POST /invoices/income`. **Tax policy per account.** Which documents are issued, and with which SAT keys and rates, is set per master account at onboarding: allowed tax regimes, CSD requirement, service type (`tipoDeServ` / `subTipServ`), ISR and IVA withholding rates, product keys and concept descriptions. The defaults are for ground passenger transport (service type `01`, 2.1% ISR withholding). Contact support to configure your account's policy; it can't be changed through the API. 1. `POST /platform-payouts` with an `Idempotency-Key` - upload and plan (synchronous) 2. `GET /platform-payouts/{id}` and `GET /platform-payouts/{id}/movements` - review the plan 3. `POST /platform-payouts/{id}/confirm` - irreversible hand-off to the stamping worker 4. `GET /platform-payouts/{id}` - poll until `completed` or `failed`, then read `result` (`completed`, `partially_completed` or `failed`) Error messages and exclusion reasons are Spanish sentences for end users; branch on `error.code`, `reason_code` and `exclusion_codes`. - name: Documents description: > SAT supporting documentation (contracts, delivery/payment proofs, communications) — upload metadata, compliance review, AI extraction, and linking to invoices, payments, receipts and clients. - name: Teams description: Team management, settings, and member administration - name: Users description: User account management and password operations - name: Auth description: > **API-only signup for AI agents and partner integrations.** A single `POST /v2/auth/signup` call provisions a Firebase Auth user, billing account, team, plan subscription, and returns API keys — no UI, no FIEL upload, no human onboarding required. Designed for the AI-agents-as-customers use case. RFC defaults to genĂ©rico (`XAXX010101000`) so agents can transact under pĂșblico en general until/unless their customer uploads their own RFC. Authenticated with `X-Internal-API-Key` (partner-issued) — Bearer tokens are team-scoped and a brand-new caller doesn't have one yet. See `AGENTS.md` in the gigstack-cli repo for end-to-end integration guide. - name: Webhooks description: Webhook management for real-time event notifications - name: Catalogs description: > **Read-only search over the SAT catalogs** Look up the SAT codes required on CFDI line items without hardcoding them: - `GET /catalogs/product-keys` — `c_ClaveProdServ`, the item `product_key` - `GET /catalogs/unit-keys` — `c_ClaveUnidad`, the item `unit_key` / `unit_name` Both are typo-tolerant full-text searches ranked by relevance. The catalogs are published by the SAT and identical for every team, so results carry no team data and ignore `livemode` — but a valid API key is still required. - name: SAT Lists description: > Read-only access to the RFC lists the SAT publishes under ArtĂ­culo 69, 69-B and 69-B Bis. gigstack re-syncs all 22 lists from the SAT's published CSVs every Sunday, so you can screen a counterparty's RFC before invoicing it without scraping the SAT yourself. externalDocs: description: Complete API Documentation & Guides url: https://docs.gigstack.io paths: /payments/{id}/support-documents: post: tags: - Payments summary: Upload support document description: > **Availability:** This operation has no configured public API gateway route and is not available through the documented base URL. Upload a supporting document (contract, proof of delivery, etc.) for a payment. **SAT 2026 Compliance:** The Mexican tax authority (SAT) can request supporting documentation to validate invoices and payments. This endpoint helps maintain compliance. **gigstack Connect:** Upload documents for other teams' payments using the `team` parameter. **Supported File Types:** - PDF files (.pdf) - Images (.png, .jpg, .jpeg, .webp) **File Size Limit:** 10MB **Document Types:** - `contract`: Service or product contracts - `delivery_proof`: Proof of delivery or service completion - `payment_proof`: Payment receipts or confirmations - `communication`: Emails, messages, or agreements - `payment_confirmation`: Payment processor confirmations - `subscription_info`: Subscription or recurring service details operationId: createPaymentsByIdSupportDocuments parameters: - $ref: '#/components/parameters/TeamParameter' - name: id in: path required: true schema: type: string description: Payment ID example: payment_1234567890 requestBody: required: true content: multipart/form-data: schema: $ref: '#/components/schemas/UploadSupportDocumentInput' responses: '201': description: Document uploaded. Standardized envelope (`timestamp` in epoch ms). content: application/json: schema: type: object required: - success - data - timestamp properties: success: type: boolean enum: - true data: $ref: '#/components/schemas/SATDocument' message: type: string timestamp: type: integer format: int64 example: success: true data: id: doc_1234567890 document_type: contract name: Contrato de servicios 2026 description: null file_url: >- https://firebasestorage.googleapis.com/v0/b/gigstackpro.appspot.com/o/teams%2Fteam_1234567890%2Fdocuments%2Fcontrato-2026.pdf?alt=media&token=9f1c7d84-3b2e-4a56-8c0d-1e7f5b9a2c43 file_name: contrato-2026.pdf file_size: 284913 mime_type: application/pdf compliance_status: pending_review created_at: 1767225600000 linked_entities: - entity_type: payment entity_id: payment_1234567890 linked_at: 1767225600000 message: Support document uploaded successfully timestamp: 1767225600000 '400': description: Bad request content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/AuthForbidden' '404': description: Payment not found content: application/json: schema: $ref: '#/components/schemas/NotFoundError' security: - bearerAuth: [] components: parameters: TeamParameter: name: team in: query required: false schema: type: string description: > **gigstack Connect:** Target team ID for multi-team access. Requires gigstack Connect enabled on your team and shared billing account. Also requires the `multipleIssuerAccounts` feature on your plan. Requests targeting a team other than the one your API key belongs to return `403` without it. Only API keys can use it: an OAuth access token sent with another team's id is rejected with `403 Team mismatch with OAuth token`. **Optional — omit it entirely** unless you are acting on another team. It deliberately carries no example value so generated snippets do not emit `?team=undefined`; when the parameter is absent, the team is derived from your API key. **Example:** `?team=team_xyz789` schemas: UploadSupportDocumentInput: type: object required: - file - documentType properties: file: type: string format: binary description: The file to upload (PDF or image, max 10MB) documentType: type: string enum: - contract - delivery_proof - payment_proof - communication - payment_confirmation - subscription_info description: Type of supporting document name: type: string example: Service Contract description: Optional custom name for the document description: type: string example: Master services agreement for 2026 description: Optional description of the document SATDocument: type: object required: - id - document_type - name - file_url - file_name - file_size - mime_type - compliance_status - created_at - linked_entities properties: id: type: string example: doc_abc123xyz description: Unique document identifier document_type: type: string enum: - contract - delivery_proof - payment_proof - communication - payment_confirmation - subscription_info - cronograma description: Type of supporting document name: type: string example: Service Contract.pdf description: Document name description: type: string nullable: true example: Main service contract for consulting services description: Optional document description file_url: type: string format: uri example: >- https://firebasestorage.googleapis.com/v0/b/gigstackpro.appspot.com/o/teams%2Fteam_1234567890%2Fdocuments%2Fcontrato-2026.pdf?alt=media&token=9f1c7d84-3b2e-4a56-8c0d-1e7f5b9a2c43 description: >- Download URL for the stored file. A Firebase download-token URL, not a public storage link: it does not expire, but treat it as opaque and re-read the resource instead of parsing it. file_name: type: string example: contract.pdf description: Original filename file_size: type: integer example: 245680 description: File size in bytes mime_type: type: string example: application/pdf description: MIME type of the file compliance_status: type: string enum: - pending_review - valid - requires_update - expired - rejected description: SAT compliance status compliance_notes: type: string nullable: true description: Notes about compliance status valid_from: type: integer format: int64 nullable: true description: Validity start timestamp (milliseconds) valid_until: type: integer format: int64 nullable: true description: Validity end timestamp (milliseconds) ai_extraction: type: object nullable: true properties: extracted_at: type: integer format: int64 description: Extraction timestamp (milliseconds) extracted_by: type: string example: ai description: Source of extraction model: type: string example: gemini-3-flash description: AI model used confidence: type: number format: float example: 0.95 description: Confidence score (0-1) extracted_data: type: object additionalProperties: true description: Extracted structured data warnings: type: array items: type: string description: Extraction warnings description: AI extraction results if analyzed audits: type: array items: type: object properties: context_type: type: string enum: - invoice - payment - receipt description: Type of entity audited against context_id: type: string description: ID of entity audited against audited_at: type: integer format: int64 description: Audit timestamp (milliseconds) result: type: string enum: - valid - warning - mismatch description: Audit result summary: type: string description: Audit summary details: type: object additionalProperties: true description: Detailed audit results description: Context-specific audit results created_at: type: integer format: int64 example: 1677651234000 description: Creation timestamp (milliseconds) created_by: type: string example: user_abc123 description: User who created the document updated_at: type: integer format: int64 example: 1677651234000 description: Last update timestamp (milliseconds) linked_entities: type: array items: type: object properties: entity_type: type: string enum: - invoice - payment - receipt - client description: Type of linked entity entity_id: type: string description: ID of linked entity linked_at: type: integer format: int64 description: Link timestamp (milliseconds) description: Entities this document is linked to ValidationErrorResponse: allOf: - $ref: '#/components/schemas/StandardErrorResponse' description: > Body validation failure. Unknown top-level keys are rejected — the validator runs in strict allowlist mode (`allowUnknown: false`), so a field not declared in the request schema produces an `unexpected_key` detail rather than being ignored. example: success: false error: code: validation_failed message: Request validation failed details: - 'currency: Field is required' - 'client_id: Unexpected field' timestamp: 1767225600000 NotFoundError: allOf: - $ref: '#/components/schemas/StandardErrorResponse' example: success: false error: code: resource_not_found message: Resource not found timestamp: 1767225600000 StandardErrorResponse: type: object description: > Standardized error envelope emitted by `sendErrorResponse` and its helpers (`sendValidationError`, `sendNotFoundError`, `sendUnauthorizedError`, `sendForbiddenError`, `sendConflictError`, `sendBadRequestError`, `sendInternalServerError`). required: - success - error - timestamp properties: success: type: boolean enum: - false example: false error: type: object required: - code - message properties: code: type: string description: > Stable machine-readable code. Values emitted by the shared helpers: `unauthorized`, `forbidden`, `invalid_token`, `validation_failed`, `invalid_request_body`, `missing_required_field`, `invalid_field_value`, `resource_not_found`, `resource_already_exists`, `resource_conflict`, `business_rule_violation`, `operation_not_allowed`, `insufficient_permissions`, `external_service_error`, `payment_processor_error`, `cfdi_service_error`, `internal_server_error`, `service_unavailable`, `rate_limit_exceeded`, `database_error`, `data_integrity_error`, `file_not_found`, `file_upload_error`, `invalid_file_format`. Individual handlers may emit additional endpoint-specific codes, documented per operation. example: validation_failed message: type: string example: Request validation failed details: oneOf: - type: string - type: array items: type: string description: > Present only when the handler supplies detail. Validation failures emit an array of `": "` strings. example: - 'currency: Field is required' timestamp: type: integer format: int64 description: Server time in epoch milliseconds. example: 1767225600000 AuthMiddlewareError: type: object description: > Raw error body produced by the authentication layer (before any endpoint runs). It is not the standardized envelope: there is no `success` and no `timestamp`. required: - message properties: message: type: string description: >- Human-readable reason. Some messages are in Spanish; branch on the HTTP status, not on this text. example: Unauthorized error: type: string description: >- OAuth error code. Present only when an OAuth access token was presented. enum: - invalid_token - token_expired - token_revoked - server_error example: token_expired error_description: type: string description: Same text as `message`. Present only alongside `error`. example: Access token has expired. Please refresh your token. details: description: >- Extra detail, e.g. `Invalid API Key` when a revoked key is rejected with `403`. oneOf: - type: string - type: object example: Invalid API Key UnauthorizedError: allOf: - $ref: '#/components/schemas/StandardErrorResponse' example: success: false error: code: unauthorized message: Unauthorized access timestamp: 1767225600000 responses: Unauthorized: description: > Authentication failed. Two different bodies can come back with a `401`: 1. **From the authentication layer**, before the endpoint runs: a raw object with `message` and — for OAuth access tokens only — `error` / `error_description`. It does **not** use the standardized envelope (`success` and `timestamp` are absent). Messages: `Unauthorized` (missing header, missing `Bearer ` prefix, unparseable token), `Unauthorized, missing team in token`, `Unauthorized, not a master team` and `Unauthorized, no matched teams` (gigstack Connect), `Invalid access token`, `Access token has expired. Please refresh your token.`, `Access token has been revoked`. 2. **From the endpoint itself**: the standardized envelope with `error.code: unauthorized`. Branch on the HTTP status, not on the body shape. content: application/json: schema: anyOf: - $ref: '#/components/schemas/AuthMiddlewareError' - $ref: '#/components/schemas/UnauthorizedError' examples: missing_or_invalid_key: summary: Authentication layer — missing or unparseable API key value: message: Unauthorized oauth_token_expired: summary: Authentication layer — expired OAuth access token value: message: Access token has expired. Please refresh your token. error: token_expired error_description: Access token has expired. Please refresh your token. connect_not_master_team: summary: >- Authentication layer — `team` sent by a team without gigstack Connect value: message: Unauthorized, not a master team endpoint_envelope: summary: Endpoint — standardized envelope value: success: false error: code: unauthorized message: Unauthorized access timestamp: 1767225600000 AuthForbidden: description: > Rejected by the authentication layer after the credential was recognised. The body is a raw object (`message`, sometimes `details`), **not** the standardized envelope. Causes: - The API key was revoked or disabled: `message: "API Key invĂĄlida."`, `details: "Invalid API Key"`. - The billing account's plan does not include API access. `message` is a Spanish sentence containing an HTML link to `https://app.gigstack.pro/memberships`. Branch on the status code; do not display or match the text. - gigstack Connect: the plan lacks the `multipleIssuerAccounts` feature (Spanish message starting `Tu plan no incluye mĂșltiples cuentas emisoras.`), or an OAuth access token was sent with a `team` other than its own (`Team mismatch with OAuth token`). An endpoint may also answer `403` for its own reasons; those are documented on the operation when they exist. content: application/json: schema: $ref: '#/components/schemas/AuthMiddlewareError' examples: revoked_api_key: summary: API key revoked or disabled value: message: API Key invĂĄlida. details: Invalid API Key plan_without_api_access: summary: Plan does not include API access value: message: >- La API se encuentra disponible para un plan mĂĄs grande, por favor actualiza tu plan aquĂ­ o ponte en contacto con soporte. connect_plan_without_multiple_issuers: summary: gigstack Connect — plan lacks multipleIssuerAccounts value: message: >- Tu plan no incluye mĂșltiples cuentas emisoras. Actualiza tu plan en https://app.gigstack.pro/memberships o ponte en contacto con soporte para operar sobre otros equipos. oauth_team_mismatch: summary: gigstack Connect — OAuth token used for another team value: message: Team mismatch with OAuth token securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: > **Authentication Method:** HTTP Bearer token. The runtime requires the literal `Bearer ` prefix — a bare token in the `Authorization` header is rejected with `401 unauthorized`. **Header Format:** `Authorization: Bearer YOUR_API_KEY` Your API key is a JWT. Live keys operate on live data (`livemode: true`); test keys operate on isolated test data (`livemode: false`). **Get your key at:** [app.gigstack.pro/settings?tab=api](https://app.gigstack.pro/settings?tab=api) **Errors:** credential failures are answered by the authentication layer with a raw `{ "message": 
 }` body, not the standardized envelope — `401` for a missing, malformed or expired token, `403` for a revoked key or a plan without API access. See the `Unauthorized` and `AuthForbidden` responses. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.