Flow

Name: Flow
Price: 0.5 USDC
Availability: InStock

Use when an agent is about to pay another agent and needs one finished answer first: should you pay this payee? PayCheck ($0.50) runs Flow's whole checker stack on the payee — payee verdict (kind, activity, contract safety), wallet approval-exposure audit, and recent USDC settlement history on Base — returning one grade (ALLOW / REVIEW / BLOCK, 0-100), a verify_status, all checks, the evidence, and a receipt. No report, no charge. Body: { payee, chain?, amountUsd? }.

TradingLiveeip155:8453Exactvia cdp

https://flow-kg4x.vercel.app/api/paycheck

TradingDefiBaseDexQuotes

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.

$32.66

Verified settled volume

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

$0.500

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 2026-10-26 06:13Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA

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.

{
  "how": {
    "body": {
      "chain": "base (optional; v1 is Base only)",
      "payee": "0x… the address that will receive the money",
      "amountUsd": "optional — the intended payment amount in USD (> 0, ≤ 100). Declaring it attaches Flow Promise coverage to the receipt (see `promise` below)."
    },
    "docs": "https://flow-kg4x.vercel.app/llms.txt",
    "parts": "The pieces stay on the menu too: /api/verdict ($0.05), /api/wallet-check ($0.05), /api/verify ($0.02), /api/settlement-verify (free).",
    "method": "POST",
    "sample": "A free house sample — Flow grading its own payee wallet — is published at https://flow-kg4x.vercel.app/paycheck-sample.html",
    "payment": "Sign accepts[0] as an x402 v2 \"exact\" EIP-3009 authorization and retry as POST with an X-PAYMENT header.",
    "promise": "Flow Promise: declare the intended payment (amountUsd, ≤ $100) and an ALLOW grade carries coverage — 25% of the payment back (max $10) from the Promise Pool if the declared payment settles on-chain and the payee does not deliver within 24h. Pool + terms: GET /api/paycheck/promise. Claims: POST /api/paycheck/claim.",
    "returns": [
      "grade { decision ALLOW | REVIEW | BLOCK, score 0-100 }",
      "verify_status: verified | failed | unverified_verifier_down",
      "checks: verdict, wallet (approval exposure), contractSafety, settlementHistory",
      "evidence — the underlying on-chain facts, with the block they were read at",
      "receipt { id, issuedAt, block }",
      "receipt.promise — the Flow Promise coverage block (present when the request declared amountUsd)"
    ],
    "guarantee": "The report is produced BEFORE settlement. If the checks cannot be produced, the call fails and the payment is never settled — no report, no charge.",
    "contentType": "application/json"
  },
  "error": "Payment required: sign an x402 v2 \"exact\" payment of $0.5 USDC on Base and retry with an X-PAYMENT header.",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:137",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:42161",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x79A02482A880bCe3F13E09da970dC34dB4cD24D1",
      "extra": {
        "name": "USDC",
        "version": "2"
      },
      "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
      "amount": "500000",
      "scheme": "exact",
      "network": "eip155:480",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://flow-kg4x.vercel.app/api/paycheck",
    "tags": [
      "trading",
      "defi",
      "base",
      "dex",
      "quotes"
    ],
    "mimeType": "application/json",
    "builderCode": "bc_60rzkc5g",
    "description": "Use when an agent is about to pay another agent and needs one finished answer first: should you pay this payee? PayCheck ($0.50) runs Flow's whole checker stack on the payee — payee verdict (kind, activity, contract safety), wallet approval-exposure audit, and recent USDC settlement history on Base — returning one grade (ALLOW / REVIEW / BLOCK, 0-100), a verify_status, all checks, the evidence, and a receipt. No report, no charge. Body: { payee, chain?, amountUsd? }.",
    "serviceName": "Flow"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "payee": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "grade": {
              "score": 100,
              "decision": "ALLOW"
            },
            "verify_status": "verified"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object"
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "headers": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "builderCode": "bc_60rzkc5g",
  "x402Version": 2
}

Accepts

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

0.5USDC≈ $0.5 USD

on Base · exact scheme

Pay 0.5 USDC on Base to 0xcF8A…a74FA. The signed payment is good for 5 minutes.

Paid to: 0xcF8A…a74FA
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 500000 smallest units

500000units

on Polygon · 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: 0xcF8A…a74FA
Token contract: 0x3c49…c3359
Payment window: 5 minutes

500000units

on Arbitrum · 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: 0xcF8A…a74FA
Token contract: 0xaf88…e5831
Payment window: 5 minutes

500000units

on eip155:480 · 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: 0xcF8A…a74FA
Token contract: 0x79A0…D24D1
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
    "amount": "500000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
    "amount": "500000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
    "amount": "500000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x79A02482A880bCe3F13E09da970dC34dB4cD24D1",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA",
    "amount": "500000",
    "scheme": "exact",
    "network": "eip155:480",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "payee": "0xcF8A8350cb42a6680005ca7FF9E485Bb55fa74FA"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "grade": {
            "score": 100,
            "decision": "ALLOW"
          },
          "verify_status": "verified"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object"
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "headers": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "additionalProperties": {
                "type": "string"
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-26 06:13Z
Last indexed by Roundhouse: 2026-10-26 20:20Z
Last enriched (probe, favicon, geo): 2026-10-24 04:16Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

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. 3 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 Flow 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=Flow'
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://flow-kg4x.vercel.app/api/paycheck, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

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