> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vin.gs/llms.txt
> Use this file to discover all available pages before exploring further.

# Post oauthregister



## OpenAPI

````yaml https://external.vin.gs/api/openapi.json post /oauth/register
openapi: 3.1.0
info:
  title: Vings External API
  version: 0.1.0
  description: >-
    External API for authenticated Vings financial data. When the credential
    owner belongs to a two-member household, financial reads cover both members.
    Transaction writes stay on the connecting member. REST routes are read-only.
    MCP also exposes opted-in write tools for transactions and budgets.
    Membership changes stay in the Vings app.
servers:
  - url: https://external.vin.gs/api
    description: Production
security: []
tags:
  - name: Transactions
    description: Transaction search and recurring payments
  - name: Cashflow
    description: Cashflow summaries
  - name: Spending
    description: Spending aggregates and merchants
  - name: Budgets
    description: Budget categories and summaries
  - name: Banks
    description: Connected bank status
  - name: Portfolio
    description: Portfolio snapshots and history
  - name: Preferences
    description: User preferences
  - name: OAuth
    description: OAuth protected-resource metadata (RFC 9728)
  - name: Health
    description: Liveness and readiness
  - name: User
    description: Authenticated user
  - name: Household
    description: >-
      Read-only household context. Joining, leaving, and credential approval
      stay in the Vings app.
  - name: MCP
    description: Model Context Protocol JSON-RPC transport
paths:
  /oauth/register:
    post:
      tags:
        - OAuth
      responses:
        '201':
          description: >-
            RFC 7591 dynamic client registration for ChatGPT, Claude, Gemini,
            Grok, and Muse callbacks
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OAuthClientRegistration'
        '400':
          description: Invalid client metadata or redirect URI
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OAuthRegistrationError'
        '429':
          description: Too many registration requests
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OAuthRegistrationError'
        '500':
          description: Registration failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OAuthRegistrationError'
        '503':
          description: Dynamic client registration is not configured
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OAuthRegistrationError'
components:
  schemas:
    OAuthClientRegistration:
      type: object
      properties:
        client_id:
          type: string
        client_name:
          type: string
        redirect_uris:
          type: array
          items:
            type: string
        token_endpoint_auth_method:
          type: string
          enum:
            - none
        grant_types:
          type: array
          items:
            type: string
        response_types:
          type: array
          items:
            type: string
        client_id_issued_at:
          type: number
      required:
        - client_id
        - client_name
        - redirect_uris
        - token_endpoint_auth_method
        - grant_types
        - response_types
        - client_id_issued_at
    OAuthRegistrationError:
      type: object
      properties:
        error:
          type: string
        error_description:
          type: string
      required:
        - error
        - error_description

````

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