API Reference

Base URL: https://x402.renvoy.ai

Core endpoints

These are the two endpoints your server calls to process payments:

`POST /settle`

Settle a payment on-chain. Submits the client’s signed USDC transfer to the network. Request:

{
  "paymentPayload": "<base64-encoded signed payment>",
  "paymentRequirements": {
    "scheme": "exact",
    "network": "eip155:8453",
    "maxAmountRequired": "100000",
    "resource": "https://api.example.com/data",
    "payTo": "0xMerchantAddress",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": { "name": "USD Coin", "version": "2" }
  }
}

Response (200):

{
  "success": true,
  "transaction": "0xabc123...",
  "network": "eip155:8453",
  "payer": "0xClientAddress"
}

`POST /verify`

Verify a payment signature without settling. Checks that the signed payment is valid (correct amount, recipient, sufficient balance) but does not submit it on-chain. Request: Same format as /settle. Response (200):

{
  "isValid": true
}

Path prefixes

The path prefix determines authentication and which facilitator tier handles the request:

`/sandbox/...`

No authentication. IP-based rate limiting. Base Sepolia and Solana Devnet (testnets).

POST https://x402.renvoy.ai/sandbox/settle
POST https://x402.renvoy.ai/sandbox/verify

1,000 settlements / 5,000 verifications per month per IP
5 RPS per IP
Minimum payment: 0.0001 USDC

`/v1/<key>/...`

API key authentication. Routes to the facilitator tier matching your plan.

POST https://x402.renvoy.ai/v1/YOUR_API_KEY/settle
POST https://x402.renvoy.ai/v1/YOUR_API_KEY/verify

`/v1/<key>/flash/...`

Same as above, but routes to the Flashblocks facilitator for ~200ms settlement. Requires Growth plan or higher.

POST https://x402.renvoy.ai/v1/YOUR_API_KEY/flash/settle

Utility endpoints

`GET /health`

Health check. No authentication.

{ "status": "ok" }

`GET /supported`

Returns supported networks and assets. No authentication.

`GET /`

Redirects to https://www.renvoy.ai. This is not an API endpoint.

Discovery

`GET /discovery/resources`

Returns a catalog of x402-enabled resources discovered from successful settlements. Public, no authentication. Resources that include Bazaar metadata (v2 extensions.bazaar or v1 outputSchema) are automatically indexed when settlements succeed through our proxy. Query parameters:

Param	Default	Description
`limit`	100	Max items per page (1-100)
`offset`	0	Pagination offset (max 10,000)
`type`	`http`	Resource type (only `http` is currently supported)

Response (200):

{
  "x402Version": 1,
  "items": [
    {
      "resource": "https://think.agentutil.net/v1/expand",
      "type": "http",
      "x402Version": 2,
      "accepts": [{ "scheme": "exact", "network": "eip155:8453", "..." : "..." }],
      "lastUpdated": "2026-02-27T02:16:30.433Z",
      "metadata": {
        "bazaar": {
          "info": { "input": { "type": "http", "method": "POST" }, "..." : "..." },
          "schema": { "..." : "..." }
        }
      }
    },
    {
      "resource": "https://example.com/api/data",
      "type": "http",
      "x402Version": 1,
      "accepts": [{ "scheme": "exact", "outputSchema": { "..." : "..." }, "..." : "..." }],
      "lastUpdated": "2026-02-27T02:16:30.433Z",
      "metadata": {}
    }
  ],
  "pagination": { "limit": 100, "offset": 0, "total": 42 }
}

v2 resources include metadata.bazaar with full Bazaar info and schema
v1 resources have metadata: {} (discovery data lives in accepts[].outputSchema)
Responses are cached for 5 minutes
Resources not seen in 90 days are automatically removed

Agent API

For AI agents that provision their own endpoints via USDC payment. See Agent Self-Provisioning for full documentation.

Method	Path	Auth	Description
`GET`	`/api/v1/agent/purchase`	None	Returns `402` with payment requirements
`POST`	`/api/v1/agent/purchase`	`X-PAYMENT` header	Purchase credits, returns API key + endpoint
`GET`	`/api/v1/agent/balance`	SIWE	Returns credit balance and usage
`PATCH`	`/api/v1/agent/config`	SIWE	Configure allowed networks, history opt-out
`GET`	`/api/v1/agent/history`	SIWE	Agent settlement history (owner-scoped)

Authentication

JWT (merchant endpoints)

Merchant endpoints (/api/me/...) require a JWT in the Authorization header:

Authorization: Bearer <JWT>

JWTs are issued by Auth0 when you sign in at renvoy.ai. The dashboard handles this automatically. If you’re calling merchant endpoints programmatically, use the JWT from your authenticated session.

SIWE (payer and agent endpoints)

Payer and agent endpoints accept SIWE (Sign-In with Ethereum) authentication via headers:

X-SIWE-Message: <base64-encoded SIWE message>
X-SIWE-Signature: 0x<signature>

The SIWE message must have a domain matching x402.renvoy.ai and include an expirationTime (messages without expiry are rejected). Alternatively, you can obtain a short-lived session token via POST /api/v1/auth/siwe and use it as a Bearer token for subsequent requests. See SIWE session tokens below.

SIWE session tokens

POST /api/v1/auth/siwe Exchange SIWE credentials for a session token. This avoids repeating SIWE signature verification on every request. Request:

POST https://x402.renvoy.ai/api/v1/auth/siwe
X-SIWE-Message: <base64-encoded SIWE message>
X-SIWE-Signature: 0x<signature>

No request body. The SIWE message and signature are sent in headers. Response (200):

{
  "token": "<session token>",
  "wallet": "0xYourWallet",
  "expires_at": 1710601200
}

Field	Type	Description
`token`	string	Opaque session token, valid for 15 minutes
`wallet`	string	Normalized wallet address extracted from the SIWE message
`expires_at`	number	Unix timestamp (seconds) when the token expires

Use the token as a Bearer token on subsequent requests:

GET https://x402.renvoy.ai/api/v1/history?limit=50
Authorization: Bearer <token>

Rate limited to 5 requests per second per IP.

Settlement History

Query settlement history for your account. All history endpoints return paginated results with opaque cursors.

Merchant history (JWT)

GET https://x402.renvoy.ai/api/me/history?limit=50&cursor=OPAQUE_CURSOR
Authorization: Bearer <JWT>

Returns settlements for all API keys under your account. Query parameters: limit (1-100, default 50), cursor (opaque, from previous response), direction (before or after). Response (200):

{
  "settlements": [
    {
      "created_at": "2025-01-15T12:00:00.000Z",
      "success": true,
      "tx_hash": "0xabc...",
      "network": "eip155:8453",
      "payer_amount": "100000",
      "tenant_id": "uuid",
      "payer": "0xClientAddress",
      "resource": "https://api.example.com/data",
      "pay_to": "0xMerchantAddress",
      "plan": "growth",
      "error_reason": null,
      "agents": [
        {
          "token_id": "42",
          "name": "Autonomous Trader",
          "url": "https://www.8004scan.io/agents/base/42"
        }
      ]
    }
  ],
  "cursor": "OPAQUE_CURSOR_FOR_NEXT_PAGE",
  "has_more": true
}

The agents array is present when the payer wallet holds ERC-8004 agent NFTs. Each entry contains token_id, name, and a url linking to the agent’s 8004scan profile. Omitted if no agents are detected.

Payer history (SIWE)

GET https://x402.renvoy.ai/api/v1/history?limit=50
X-SIWE-Message: <base64-encoded SIWE message>
X-SIWE-Signature: 0x<signature>

Returns settlements where the authenticated wallet was the payer. You can also use a session token as a Bearer token instead of SIWE headers.

Admin history

GET https://x402.renvoy.ai/admin/history?owner_id=X&tenant_id=Y&payer=0x...&tx_hash=0x...&success=true

Requires admin auth. Supports all filters as query parameters.

Opt-out

Tenants can disable settlement logging per API key:

PATCH https://x402.renvoy.ai/api/me/tenants/:id
{ "history_enabled": false }

Or for agents via SIWE:

PATCH https://x402.renvoy.ai/api/v1/agent/config
{ "history_enabled": false }

Set history_enabled to true (or omit it) to re-enable. History is enabled by default.

Analytics

Aggregated analytics for your settlements. Returns summary metrics, daily time-series, top resources, error breakdown, and network distribution for a given time window. Analytics are derived from logged settlements. Keys with history disabled (history_enabled: false) are excluded from analytics data.

Merchant analytics (JWT)

GET https://x402.renvoy.ai/api/me/analytics?days=30
Authorization: Bearer <JWT>

Query parameters: days (7, 30, or 90 — default 30). Response (200):

{
  "summary": {
    "total_settlements": 142,
    "successful_settlements": 135,
    "failed_settlements": 7,
    "success_rate": 0.9507,
    "total_volume_atomic": "28500000",
    "unique_payers": 23,
    "prev_total_settlements": 98,
    "prev_success_rate": 0.9388,
    "prev_total_volume_atomic": "19200000",
    "prev_unique_payers": 17
  },
  "timeseries": [
    {
      "date": "2026-03-01",
      "success_count": 5,
      "failed_count": 1,
      "total_volume_atomic": "1200000"
    }
  ],
  "top_resources": [
    {
      "resource": "https://api.example.com/data",
      "pay_to": "0xMerchantAddress",
      "network": "eip155:8453",
      "settlement_count": 42,
      "success_count": 40,
      "total_volume_atomic": "8000000"
    }
  ],
  "errors": [
    { "error_reason": "insufficient_funds", "count": 4 },
    { "error_reason": "unknown", "count": 3 }
  ],
  "networks": [
    { "network": "eip155:8453", "count": 120, "total_volume_atomic": "24000000" },
    { "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp", "count": 22, "total_volume_atomic": "4500000" }
  ],
  "period": {
    "start_date": "2026-02-13",
    "end_date": "2026-03-15",
    "days": 30,
    "timezone": "UTC"
  }
}

All volume fields are in atomic USDC units (6 decimals). Divide by 1,000,000 for human-readable values.
period.start_date is inclusive, period.end_date is exclusive (today). Only completed UTC days are included — today’s activity will appear tomorrow.
prev_* fields compare against the prior period of equal length. They are null when there are no settlements in the prior period.
unique_payers counts distinct known payer addresses. The same wallet on different networks counts once.
timeseries contains only days with activity. Zero-fill missing dates client-side using start_date (inclusive) to end_date (exclusive).

Admin analytics

GET https://x402.renvoy.ai/admin/analytics?days=30&owner_id=X&tenant_id=Y
Authorization: Bearer <admin key>

Requires admin auth. Same response format as merchant analytics. Supports optional owner_id and tenant_id query parameters to scope results; omit both for platform-wide analytics.

Error responses

All error responses return JSON with an error field:

{ "error": "description of what went wrong" }

Status	Description	When
`400`	Bad request	Malformed payload, payment below minimum
`401`	Unauthorized	Invalid or missing API key, JWT, or SIWE credentials
`402`	Payment required	Agent purchase endpoint (expected, contains payment requirements)
`403`	Forbidden	Flash mode without Growth plan; network not allowed; flagged by KYT screening
`409`	Conflict	Duplicate transaction (already processed)
`413`	Payload too large	Request body exceeds limit (16 KB for `/settle` and `/verify`, 4 KB for other endpoints)
`429`	Rate limit / quota exceeded	RPS exceeded, or settlement/verification quota exhausted
`502`	Upstream error	Facilitator unreachable
`503`	Service unavailable	Facilitator not configured; KYT screening unavailable

Rate limit headers

Metered responses include remaining quota in headers:

x-settlement-remaining: 847
x-verification-remaining: 9231

Starter and Growth plans: the remaining count includes both free quota and purchased credits. When quota is exhausted, 429 responses include:

x-settlement-remaining: 0

or:

x-verification-remaining: 0

Overview

Getting Started

Integration

Reference

Core endpoints

`POST /settle`

`POST /verify`

Path prefixes

`/sandbox/...`

`/v1/<key>/...`

`/v1/<key>/flash/...`

Utility endpoints

`GET /health`

`GET /supported`

`GET /`

Discovery

`GET /discovery/resources`

Agent API

Authentication

JWT (merchant endpoints)

SIWE (payer and agent endpoints)

SIWE session tokens

Settlement History

Merchant history (JWT)

Payer history (SIWE)

Admin history

Opt-out

Analytics

Merchant analytics (JWT)

Admin analytics

Error responses

Rate limit headers

Overview

Getting Started

Integration

Reference

Documentation Index

​Core endpoints

​POST /settle

​POST /verify

​Path prefixes

​/sandbox/...

​/v1/<key>/...

​/v1/<key>/flash/...

​Utility endpoints

​GET /health

​GET /supported

​GET /

​Discovery

​GET /discovery/resources

​Agent API

​Authentication

​JWT (merchant endpoints)

​SIWE (payer and agent endpoints)

​SIWE session tokens

​Settlement History

​Merchant history (JWT)

​Payer history (SIWE)

​Admin history

​Opt-out

​Analytics

​Merchant analytics (JWT)

​Admin analytics

​Error responses

​Rate limit headers

Core endpoints

`POST /settle`

`POST /verify`

Path prefixes

`/sandbox/...`

`/v1/<key>/...`

`/v1/<key>/flash/...`

Utility endpoints

`GET /health`

`GET /supported`

`GET /`

Discovery

`GET /discovery/resources`

Agent API

Authentication

JWT (merchant endpoints)

SIWE (payer and agent endpoints)

SIWE session tokens

Settlement History

Merchant history (JWT)

Payer history (SIWE)

Admin history

Opt-out

Analytics

Merchant analytics (JWT)

Admin analytics

Error responses

Rate limit headers