> ## 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.

# Create a named LLM config owned by the caller, optionally storing the

> Create a named LLM config owned by the caller, optionally storing the
referenced API-key secret and/or marking it as the caller's default.



## OpenAPI

````yaml /api-reference/openapi.json post /api/llm-configs
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/llm-configs:
    post:
      tags:
        - llm-router
      summary: Create a named LLM config owned by the caller, optionally storing the
      description: |-
        Create a named LLM config owned by the caller, optionally storing the
        referenced API-key secret and/or marking it as the caller's default.
      operationId: create
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateLlmConfigRequest'
        required: true
      responses:
        '201':
          description: >-
            `data` is the created config object (id, name, provider, model,
            fallback_models, temperature, max_tokens, api_key_secret_name,
            pinned, pinned_model, tier1_model, tier2_model, tier3_model,
            is_default, created_at, updated_at)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/McpEnvelope'
        '400':
          description: Validation failed (name/provider/model/pinned_model/secret)
        '401':
          description: Missing or invalid session
        '409':
          description: A config with this name already exists
components:
  schemas:
    CreateLlmConfigRequest:
      type: object
      required:
        - name
        - provider
      properties:
        api_key_secret_name:
          type:
            - string
            - 'null'
          description: >-
            Name of the caller's `user_secrets` row holding the provider API
            key. None ⇒ the

            platform-key path.
        fallback_models:
          type: array
          items:
            type: string
        is_default:
          type: boolean
          description: Mark this as the caller's default (clears any prior default).
        max_tokens:
          type:
            - integer
            - 'null'
          format: int64
        model:
          type:
            - string
            - 'null'
        name:
          type: string
        pinned:
          type: boolean
        pinned_model:
          type:
            - string
            - 'null'
        provider:
          type: string
        secret_value:
          type:
            - string
            - 'null'
          description: >-
            Plaintext key to store under `api_key_secret_name` when no such
            secret exists yet.

            Required when the named secret is absent; ignored (as an upsert)
            when it already exists.
        temperature:
          type:
            - number
            - 'null'
          format: double
        tier1_model:
          type:
            - string
            - 'null'
          description: >-
            Per-config tier→model overrides. When set, the smart router uses
            these instead of

            the global `model_registry` for this config's provider.
        tier2_model:
          type:
            - string
            - 'null'
        tier3_model:
          type:
            - string
            - 'null'
    McpEnvelope:
      type: object
      description: |-
        Doc-only schema for the standard MCP `ApiResponse` envelope
        (`{"data": …, "status_code": N, "message": "…"}`). Most `/api/mcp/*`
        payloads are service-layer `serde_json::Value` views, so `data` is
        documented as a free-form object; each route's response description says
        what it carries.
      required:
        - data
        - status_code
        - message
      properties:
        data:
          type:
            - object
            - 'null'
        message:
          type: string
        status_code:
          type: integer
          format: int32
          example: 200
          minimum: 0

````