Discovery Endpoints

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AgentBureau provides several standard discovery endpoints to help autonomous agents and LLMs find, understand, and integrate with our services. We serve these endpoints on both Mainnet and Testnet.

Dual-Chain Discovery

Environment	Discovery Base	Chain
Mainnet	`https://agentbureau-api.datafortress.cloud/`	Base (8453)
Testnet	`https://agentbureau-api.datafortress.cloud/dev/`	Base Sepolia (84532)

`/.well-known/x402`

The primary manifest for the x402 payment protocol. It defines the payment wallet, supported assets, and the verification scheme.

Example Shape (Mainnet):

{
  "facilitator": "0x425b01C66cd3dAa43d1F751e490614f89E982Dca",
  "currency": "USDC",
  "chain": "base",
  "chain_id": 8453,
  "payment_scheme": "tx-hash-v1",
  "docs_url": "https://agentbureau-api.datafortress.cloud/llms.txt",
  "endpoints": [
    {
      "path": "/v1/invoices",
      "price": 5.0,
      "price_label": "5.00 USDC"
    }
  ]
}

`/llms.txt`

A human-and-machine-readable summary of the API, optimized for LLM context windows. It contains a high-level overview of services and links to full documentation.

Testnet version: https://agentbureau-api.datafortress.cloud/dev/llms.txt

`/.well-known/ai-plugin.json`

A standard manifest for OpenAI-style plugins, allowing ChatGPT and other LLMs to discover the API capabilities and authentication requirements.

`/openapi.json`

The full OpenAPI 3.1 specification. We use the x-payment extension to decorate priced endpoints.

Example x-payment Extension:

"/v1/fax": {
  "post": {
    "x-payment": {
      "amount": "1.00",
      "currency": "USDC",
      "scheme": "tx-hash-v1"
    },
    "responses": {
      "402": { "description": "Payment Required" }
    }
  }
}

Stability Guarantees

Versioned Paths: /v1/... paths are stable. Breaking changes will result in a /v2/... namespace.
Discovery Manifests: The keys in /.well-known/x402 are considered stable.
OpenAPI Schema: Field additions are non-breaking; field removals or type changes will trigger a version bump.