Hilt

Hilt Agent Commerce API

The Agent Commerce API from Hilt — 4 operation(s) for agent commerce.

Documentation GitHub OpenAPI

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

POST /mcp Call the agent gateway over MCP · Call the Hilt Agent Gateway over MCP Streamable HTTP #

Ask an LLM

“Is there an MCP endpoint my agent can use for the catalog, quotes and plan activation?”

“Can an agent activate an API plan paid in Solana USDC via MCP tools?”

Tell an agent

Connect my agent to the Hilt MCP gateway.

Call the MCP gateway to get a quote from the catalog.

GET /.well-known/agent-card.json Get the A2A agent card · Get the Hilt Pay A2A Agent Card #

Ask an LLM

“Where is the A2A Agent Card for the Hilt Pay agent published?”

“What skills does the Hilt Pay agent advertise at the current agent-card path?”

Tell an agent

Fetch the agent card from /.well-known/agent-card.json.

Show me the current A2A agent card.

GET /.well-known/agent.json Get the A2A agent card from the legacy path · Get the Hilt Pay A2A Agent Card from the legacy discovery path #

Ask an LLM

“My registry still looks for agent.json - is the card served there?”

“Does the older /.well-known/agent.json discovery path still work?”

Tell an agent

Fetch the agent card from the legacy /.well-known/agent.json path.

Load the compatibility copy of the agent card.

POST /a2a/jsonrpc Send a JSON-RPC message to the A2A agent · Call the Hilt Pay agent over A2A JSON-RPC #

Ask an LLM

“How do I talk to the Hilt Pay agent over A2A JSON-RPC?”

“Can my agent send tasks to the payments agent using the A2A protocol?”

Tell an agent

Send a JSON-RPC request to the Hilt Pay A2A agent.

Message the payments agent over A2A.

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Hilt Agent Commerce API
  description: Hilt Pay Workspace and Hilt Pay API routes for zero-custody Solana checkout, MPP metered payment channels, receipts, memberships, entitlements, native subscriptions, webhooks, and support context.
  version: 1.0.0
  contact:
    name: Hilt
    url: https://www.hilt.so
    email: hello@hilt.so
  x-guidance: Start with POST /v1/access/agent-bootstrap. An agent can purchase 30 days of Starter, Growth, or Scale through the matching x402 V2 activation endpoint paid in Solana USDC. For metered integrations, settle PAYMENT-SIGNATURE through POST /v1/access/x402/settle and atomically consume through POST /v1/access/entitlements/consume before serving. Never send private keys, seed phrases, or wallet secrets.
servers:
- url: https://api.hilt.so
tags:
- name: Agent Commerce
paths:
  /mcp:
    post:
      operationId: callHiltAgentGatewayMcp
      summary: Call the Hilt Agent Gateway over MCP Streamable HTTP
      description: Standards-based MCP endpoint exposing the canonical Hilt catalog, quote and bootstrap tools plus x402 V2 API-plan activation tools settled in Solana USDC.
      tags:
      - Agent Commerce
      security: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: MCP JSON-RPC response
        '202':
          description: MCP notification accepted
  /.well-known/agent-card.json:
    get:
      operationId: getHiltA2aAgentCard
      summary: Get the Hilt Pay A2A Agent Card
      tags:
      - Agent Commerce
      security: []
      responses:
        '200':
          description: A2A Agent Card
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
  /.well-known/agent.json:
    get:
      operationId: getHiltA2aAgentCardLegacy
      summary: Get the Hilt Pay A2A Agent Card from the legacy discovery path
      description: Compatibility alias for registries that still discover A2A Agent Cards at /.well-known/agent.json. The standards-current A2A path remains /.well-known/agent-card.json.
      tags:
      - Agent Commerce
      security: []
      responses:
        '200':
          description: A2A Agent Card
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
  /a2a/jsonrpc:
    post:
      operationId: callHiltA2aAgent
      summary: Call the Hilt Pay agent over A2A JSON-RPC
      tags:
      - Agent Commerce
      security: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: A2A JSON-RPC response
x-hilt-agent-commerce:
  offer: https://api.hilt.so/v1/agent-commerce/offer
  catalog: https://api.hilt.so/agent-catalog.json
  pricing: https://api.hilt.so/pricing
  x402: https://api.hilt.so/x402

Hilt Agent Commerce API

Operations 4

Documentation

Specifications

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OpenAPI Specification