Greenhead Labs

Name: Greenhead Labs
Price: 0.002 USDC
Availability: InStock

Greenhead Labs x402 XRPL pay-per-call API. No accounts or JWT. Pay XRP on XRPL mainnet, retry with X-Payment-Txid. XRPL data, Grok AI, portfolio tools. payTo: rnPmtGgU7fMKrud7m1oK7E1ogN35qDbKV1

TradingLiveeip155:8453Exactvia cdp

https://x402.greenhead.io/v1/base/ping

x402BaseUsdc

Calls · 30d

4↑ 33%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 17 snapshots so far.

$0.01

Verified settled volume

5 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0020

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-09-17 06:17Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x6bF820a4b8a1722Bf83d6F84d05A2125e2f61d1a

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "code": "payment_required",
  "asset": "XRP",
  "error": "payment_required",
  "payTo": "rnPmtGgU7fMKrud7m1oK7E1ogN35qDbKV1",
  "assets": [
    "XRP",
    "RLUSD",
    "USDC"
  ],
  "header": "X-Payment-Txid",
  "accepts": [
    {
      "asset": "XRP",
      "payTo": "rnPmtGgU7fMKrud7m1oK7E1ogN35qDbKV1",
      "amount": "2000",
      "scheme": "exact",
      "network": "xrpl:0"
    },
    {
      "asset": "RLUSD",
      "extra": {
        "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
        "currency": "RLUSD",
        "currencyHex": "524C555344000000000000000000000000000000"
      },
      "payTo": "rnPmtGgU7fMKrud7m1oK7E1ogN35qDbKV1",
      "amount": "10000",
      "scheme": "exact",
      "network": "xrpl:0"
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x6bF820a4b8a1722Bf83d6F84d05A2125e2f61d1a",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "network": "xrpl:0",
  "endpoint": {
    "name": "base-ping",
    "path": "/v1/base/ping",
    "method": "GET"
  },
  "priceXrp": "0.002",
  "discovery": {
    "skill": "https://x402.greenhead.io/skills/x402/SKILL.md",
    "health": "https://x402.greenhead.io/health",
    "robots": "https://x402.greenhead.io/robots.txt",
    "status": "https://x402.greenhead.io/status",
    "catalog": "https://x402.greenhead.io/.well-known/x402",
    "llmsTxt": "https://x402.greenhead.io/llms.txt",
    "metrics": "https://x402.greenhead.io/api/metrics",
    "openapi": "https://x402.greenhead.io/openapi.json",
    "sitemap": "https://x402.greenhead.io/sitemap.xml",
    "receipts": "https://x402.greenhead.io/v1/receipts/{txid}",
    "agentsTxt": "https://x402.greenhead.io/agents.txt",
    "agentsJson": "https://x402.greenhead.io/agents.json",
    "llmsFullTxt": "https://x402.greenhead.io/llms-full.txt",
    "documentation": "https://x402.greenhead.io/docs",
    "documentationMarkdown": "https://x402.greenhead.io/docs.md"
  },
  "retryable": true,
  "httpStatus": 402,
  "priceDrops": "2000",
  "priceRlusd": "0.01",
  "baseNetwork": "eip155:8453",
  "instructions": "Send priceXrp XRP or 0.01 RLUSD to payTo on the XRP Ledger, then retry with X-Payment-Txid set to the validated Payment transaction hash.",
  "paymentOptions": [
    {
      "asset": "XRP",
      "priceXrp": "0.002",
      "priceDrops": "2000"
    },
    {
      "asset": "RLUSD",
      "price": "0.01",
      "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
      "currency": "RLUSD",
      "priceDrops": "10000",
      "currencyHex": "524C555344000000000000000000000000000000"
    }
  ],
  "priceRlusdDrops": "10000",
  "paymentSignatureHeader": "PAYMENT-SIGNATURE"
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

2000units

on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: rnPmtG…DbKV1
Token contract: XRP

10000units

on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: rnPmtG…DbKV1
Token contract: RLUSD

0.002USDC≈ $0.002 USD

on Base · exact scheme

Pay 0.002 USDC on Base to 0x6bF8…61d1a. The signed payment is good for 1 minute.

Paid to: 0x6bF8…61d1a
USD Coin contract: 0x8335…02913
Payment window: 1 minute
As published: 2000 smallest units

The catalog’s raw entry

[
  {
    "asset": "XRP",
    "payTo": "rnPmtGgU7fMKrud7m1oK7E1ogN35qDbKV1",
    "amount": "2000",
    "scheme": "exact",
    "network": "xrpl:0"
  },
  {
    "asset": "RLUSD",
    "extra": {
      "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
      "currency": "RLUSD",
      "currencyHex": "524C555344000000000000000000000000000000"
    },
    "payTo": "rnPmtGgU7fMKrud7m1oK7E1ogN35qDbKV1",
    "amount": "10000",
    "scheme": "exact",
    "network": "xrpl:0"
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x6bF820a4b8a1722Bf83d6F84d05A2125e2f61d1a",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET"
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "pong": true,
          "txid": null,
          "asset": "USDC",
          "payTo": "0x6bF820a4b8a1722Bf83d6F84d05A2125e2f61d1a",
          "amount": "0.002",
          "network": "eip155:8453"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "description": "Prove route for Base mainnet USDC x402 (eip155:8453). HTTP 200 after CDP facilitator verify+settle.",
    "routeTemplate": "/v1/base/ping"
  }
}

Provenance

Seen in the source catalog: 2026-09-17 06:17Z
Last indexed by Roundhouse: 2026-09-23 13:10Z
Last enriched (probe, favicon, geo): 2026-09-23 02:45Z
x402 version: 2
Max timeout: 60s
Liveness probe: HTTP 404

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 17 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service Greenhead Labs and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Greenhead%20Labs'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://x402.greenhead.io/v1/base/ping, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.