> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rail402.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Prometheus metrics

> Metrics in the Prometheus text format. Never rate-limited.



## OpenAPI

````yaml /api-reference/openapi.yaml get /metrics
openapi: 3.1.0
info:
  title: Rail402
  version: 0.0.0
  summary: x402 facilitator and Bazaar discovery layer for Stellar.
  description: >
    The Rail402 HTTP service. `/supported`, `/verify` and `/settle` follow the
    x402 version 2 facilitator

    interface; `/discovery/*` serves the Bazaar catalog and search.


    Every endpoint except `/health`, `/ready` and `/metrics` is rate-limited per
    client address. A limited

    request gets HTTP 429 with a `Retry-After` header and the code
    `rate_limited`.
  license:
    name: Apache-2.0
    identifier: Apache-2.0
servers:
  - url: https://testnet.rail402.dev
    description: Hosted testnet facilitator (stellar:testnet only, no API key)
security: []
tags:
  - name: Facilitator
    description: x402 facilitator interface.
  - name: Discovery
    description: Bazaar catalog and natural-language search.
  - name: Operations
    description: Health, readiness, metrics and usage.
paths:
  /metrics:
    get:
      tags:
        - Operations
      summary: Prometheus metrics
      description: Metrics in the Prometheus text format. Never rate-limited.
      operationId: getMetrics
      responses:
        '200':
          description: The metrics.
          content:
            text/plain:
              schema:
                type: string

````

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