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Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
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This API
curl "https://apis.io/api/v1/apis/gvnr-dev:gvnr-dev-mcp-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: Gvnr MCP API
version: 1.8.1
description: Budget & cost control for AI agents — per-agent spend caps, rate limits, idempotency, post-call reconciliation, and human approval bridges, enforced before each call.
servers:
- url: https://gvnr.dev
tags:
- name: MCP
paths:
/mcp:
post:
summary: MCP server endpoint (Streamable HTTP)
security:
- bearerAuth: []
description: 'Pass api_key as query param or Authorization: Bearer header. Body and response are JSON-RPC 2.0 envelopes per the MCP spec (tools/list, tools/call, etc.); shapes are opaque to this OpenAPI definition.'
responses:
'200':
description: MCP JSON-RPC response
content:
application/json:
schema:
type: object
description: JSON-RPC 2.0 envelope; see modelcontextprotocol.io for shape
default:
description: Error
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
tags:
- MCP
operationId: postMcp
x-operation-id-source: derived
components:
schemas:
ErrorResponse:
type: object
required:
- error
properties:
error:
type: string
description: Stable machine-readable error code (e.g. "invalid_params", "rate_limited", "not_found")
required:
type: array
items:
type: string
description: Names/descriptors of required fields when error is "invalid_params"
hint:
type: string
description: Human-readable guidance for resolving the error
detail:
type: string
description: Additional context for the error
valid:
type: array
items:
type: string
description: Allowed values when input was rejected as out-of-set
valid_channels:
type: array
items:
type: string
description: Allowed notification channels (for approval requests)
retryable:
type: boolean
description: Whether retrying the same request can succeed. false = fix input / auth / config first, or terminal. Omitted when retryability is already implied by required/valid (fix the input) or retry_after_ms (wait, then retry).
retry_after_ms:
type: integer
description: Milliseconds to wait before retrying — present on rate_limited (429). Matches the runtime rate_check field.
limit:
type: string
description: Description of the limit that was hit
securitySchemes:
bearerAuth:
type: http
scheme: bearer
description: API key from POST /v1/account