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

# `GET /api/mcp/oauth/callback` — public browser redirect target (HTML, not JSON).



## OpenAPI

````yaml /api-reference/openapi.json get /api/mcp/oauth/callback
openapi: 3.1.0
info:
  title: Nasiko API
  description: >-
    HTTP API for the Nasiko OpenRuntime: agents, coding harnesses, TokenOps,
    routing, MCP, and secrets. Spec is generated from annotated routes; some
    surfaces are documented on the hand-written pages alongside this file.
  license:
    name: ''
  version: 0.1.0
servers: []
security: []
tags:
  - name: secrets
    description: Encrypted per-user agent secrets
  - name: catalog
    description: >-
      Agent catalog: registration, discovery, versions, per-agent secrets, and
      source import
  - name: agents
    description: >-
      Agent lifecycle: deployments, LLM routing config, update/rollback,
      upload-and-deploy
  - name: orchestrator
    description: >-
      A2A dispatch: routing-engine/ReAct orchestrator and direct agent chat,
      plus routing stats
  - name: users
    description: >-
      User management: CRUD, roles, credentials, accessible agents
      (superuser-only)
  - name: usage
    description: Per-user token usage and cost reporting
  - name: observability
    description: Sessions, traces, spans, agent logs, and FinOps reporting
  - name: llm-router
    description: LLM routing presets, provider/model catalog, and tier→model registry
  - name: mcp
    description: >-
      MCP gateway: agent-facing JSON-RPC tool calls, connector
      registration/upload/sharing, credentials & OAuth, and per-agent tool
      permissions
paths:
  /api/mcp/oauth/callback:
    get:
      tags:
        - mcp
      summary: >-
        `GET /api/mcp/oauth/callback` — public browser redirect target (HTML,
        not JSON).
      operationId: callback
      parameters:
        - name: code
          in: query
          description: OAuth authorization code
          required: false
          schema:
            type: string
        - name: state
          in: query
          description: Opaque state minted by the authorize step
          required: false
          schema:
            type: string
        - name: error
          in: query
          description: OAuth error code, if the provider denied
          required: false
          schema:
            type: string
        - name: error_description
          in: query
          description: Human-readable OAuth error
          required: false
          schema:
            type: string
      responses:
        '200':
          description: HTML page closing the popup, or an HTML error page
          content:
            text/html:
              schema:
                type: string
        '302':
          description: Redirect back to the requesting app

````