> ## 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. # Select your active team or billing account > Requires a verified Firebase ID token or signed, active personal MCP token. Team API keys and OAuth client credentials cannot act as their creator. Firebase callers may access their own identity before joining a team. MCP callers remain subject to current credential/team authorization. Authentication is verified in the backend, including when requests pass through the API gateway. ## OpenAPI ````yaml openapi.json POST /users/me/active-context 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. Internal partner provisioning is outside this public contract; 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: [] externalDocs: description: Complete API Documentation & Guides url: https://docs.gigstack.io paths: /users/me/active-context: post: tags: - Your Account summary: Select your active team or billing account description: >- Requires a verified Firebase ID token or signed, active personal MCP token. Team API keys and OAuth client credentials cannot act as their creator. Firebase callers may access their own identity before joining a team. MCP callers remain subject to current credential/team authorization. Authentication is verified in the backend, including when requests pass through the API gateway. operationId: selectSelfActiveContext requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/SelfContextInput' responses: '200': description: Persisted account state or action result. content: application/json: schema: type: object properties: success: type: boolean data: type: object properties: active_team_id: type: string nullable: true active_billing_account_id: type: string required: - active_team_id - active_billing_account_id timestamp: type: number required: - success - data - timestamp '400': description: Invalid fields, empty patch, or invalid cursor. '401': description: A valid Firebase or personal MCP credential is required. '403': description: >- Disabled account, blocked membership, or insufficient account authority. '404': description: Resource not found within your authorized scope. '409': description: >- Context mismatch, changed membership, or personal token limit reached. '500': description: Internal failure. Reconcile current state before retrying a write. security: - bearerAuth: [] components: schemas: SelfContextInput: type: object additionalProperties: false properties: team_id: type: string minLength: 1 maxLength: 128 pattern: ^[A-Za-z0-9_-]+$ billing_account_id: type: string minLength: 1 maxLength: 128 pattern: ^[A-Za-z0-9_-]+$ description: >- Supply team_id, billing_account_id, or both. The server verifies current membership/account authority; it never trusts profile membership mirrors alone. 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.