x402.professorsausages.com

35 APIs and 184 operations your agent can buy one call at a time. $0.01–$0.05 per call in USDC on base via x402. No API key, no account, no subscription.

OtherLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far.
$5.04
Verified settled volume
362 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
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
Never called
–
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x54ebFCF3870439B9db62381848c5DabC05c70d5B

The wallet the 402 directs payment to. Its full payment record 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.

Recent payments · which agents last used it

Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.

Payer PayeeChainAmountx402RouteAgeTxn hash
0xa1d1…19780x54eb…0d5bBaseBase$0.02100%coinbase22h ago0xc4ff04…28b2aa
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase2d ago0xebaab3…65b67c
0xa19f…accc0x54eb…0d5bBaseBase$0.03100%coinbase2d ago0xe07205…e0b59c
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase2d ago0x1c816f…5043b7
0x54e1…f4e00x54eb…0d5bBaseBase$0.02100%coinbase5d ago0x352a7a…70cb36
0xe629…4b540x54eb…0d5bBaseBase$0.02100%coinbase8d ago0xded668…56b6e1
0xe629…4b540x54eb…0d5bBaseBase$0.02100%coinbase8d ago0x170190…7d9821
0xe629…4b540x54eb…0d5bBaseBase$0.02100%coinbase8d ago0x38991a…6b206b
0xe629…4b540x54eb…0d5bBaseBase$0.02100%coinbase8d ago0x1e466f…12eacf
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase9d ago0x2ad2b6…545a38
0xa19f…accc0x54eb…0d5bBaseBase$0.03100%coinbase9d ago0x07a273…1d1385
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase9d ago0x599756…cc50a6
0x7722…5e4a0x54eb…0d5bBaseBase$0.02100%coinbase16d ago0x0b3672…da1372
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase16d ago0x1d9fec…531bd1
0xa19f…accc0x54eb…0d5bBaseBase$0.03100%coinbase16d ago0xdc75f9…fced5c
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase16d ago0xb86a2d…83a5d7
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase23d ago0x8e3bbb…76426a
0xa19f…accc0x54eb…0d5bBaseBase$0.03100%coinbase23d ago0x8dc079…b31172
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase23d ago0x3d0133…1faafe
0x170d…fa100x54eb…0d5bBaseBase$0.02100%coinbase28d ago0x662b31…dc6239
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase30d ago0x7ab8c9…3615bc
0xa1d1…19780x54eb…0d5bBaseBase$0.02100%coinbase30d ago0xe88db7…b5ce6c
0xa19f…accc0x54eb…0d5bBaseBase$0.02100%coinbase37d ago0x0cbf77…1fd7d8
0x170d…fa100x54eb…0d5bBaseBase$0.02100%coinbase37d ago0x3570f1…4f13af
0x0fcb…87740x54eb…0d5bBaseBase$0.02100%coinbase39d ago0x5da07c…36296d

Live 402 challenge

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

{
  "error": "payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 60
    }
  ],
  "resource": {
    "url": "https://x402.professorsausages.com/sanctions-screen/changes",
    "tags": [
      "sanctions",
      "ofac",
      "kyc",
      "compliance",
      "screening"
    ],
    "mimeType": "application/json",
    "description": "Every OFAC SDN/Consolidated addition, removal and record change observed in the rolling log, newest first, with the coverage start date so an empty answer is unambiguous",
    "serviceName": "OFAC Sanctions Name Screen"
  },
  "extensions": {
    "help": {
      "docs": "https://x402.professorsausages.com/sanctions-screen",
      "sample": "https://x402.professorsausages.com/sanctions-screen/sample",
      "example": "https://x402.professorsausages.com/sanctions-screen/changes",
      "openapi": "https://x402.professorsausages.com/sanctions-screen/openapi.json"
    },
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "days": "Look-back window in days; clamped to the log's coverage start (`loggingSince` in the response).",
            "list": "Which OFAC list to report changes from.",
            "program": "Filter every bucket by a single program tag. See /sanctions-screen/programs."
          }
        },
        "output": {
          "type": "object",
          "required": [
            "window",
            "sourcePublishDate",
            "added",
            "removed",
            "modified",
            "counts",
            "disclaimer"
          ],
          "properties": {
            "about": {
              "type": "string",
              "description": "What this response is and where its data comes from, in one sentence."
            },
            "added": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "id",
                  "name",
                  "type",
                  "programs",
                  "list",
                  "date"
                ],
                "properties": {
                  "id": {
                    "type": "integer",
                    "description": "OFAC ent_num — use with /sanctions-screen/entity/{id}."
                  },
                  "date": {
                    "type": "string",
                    "format": "date",
                    "description": "Date WE OBSERVED the change; OFAC's CSV feeds publish no action date."
                  },
                  "list": {
                    "enum": [
                      "sdn",
                      "cons"
                    ],
                    "type": "string"
                  },
                  "name": {
                    "type": "string"
                  },
                  "type": {
                    "enum": [
                      "individual",
                      "entity",
                      "vessel",
                      "aircraft"
                    ],
                    "type": "string"
                  },
                  "programs": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    },
                    "description": "Program tags, as filtered by `program`."
                  }
                }
              },
              "description": "Newest first."
            },
            "counts": {
              "type": "object",
              "required": [
                "added",
                "removed",
                "modified"
              ],
              "properties": {
                "added": {
                  "type": "integer"
                },
                "removed": {
                  "type": "integer"
                },
                "modified": {
                  "type": "integer"
                }
              }
            },
            "window": {
              "type": "object",
              "required": [
                "from",
                "to",
                "requestedFrom",
                "loggingSince",
                "truncated"
              ],
              "properties": {
                "to": {
                  "type": "string",
                  "format": "date"
                },
                "from": {
                  "type": "string",
                  "format": "date",
                  "description": "Start actually served — never earlier than loggingSince."
                },
                "truncated": {
                  "type": "boolean",
                  "description": "True when the requested look-back reached past our coverage."
                },
                "loggingSince": {
                  "type": [
                    "string",
                    "null"
                  ],
                  "format": "date",
                  "description": "First date this log has coverage for. An empty window is only meaningful back to here."
                },
                "requestedFrom": {
                  "type": "string",
                  "format": "date",
                  "description": "to − days, before clamping."
                }
              }
            },
            "related": {
              "type": "object",
              "description": "Next steps as paths on this origin. Each is priced by its own 402 challenge; GET /.well-known/x402 prices the whole origin in one free call.",
              "additionalProperties": {
                "type": "string"
              }
            },
            "removed": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "id",
                  "name",
                  "type",
                  "programs",
                  "list",
                  "date"
                ],
                "properties": {
                  "id": {
                    "type": "integer",
                    "description": "OFAC ent_num — use with /sanctions-screen/entity/{id}."
                  },
                  "date": {
                    "type": "string",
                    "format": "date",
                    "description": "Date WE OBSERVED the change; OFAC's CSV feeds publish no action date."
                  },
                  "list": {
                    "enum": [
                      "sdn",
                      "cons"
                    ],
                    "type": "string"
                  },
                  "name": {
                    "type": "string"
                  },
                  "type": {
                    "enum": [
                      "individual",
                      "entity",
                      "vessel",
                      "aircraft"
                    ],
                    "type": "string"
                  },
                  "programs": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    },
                    "description": "Program tags, as filtered by `program`."
                  }
                }
              },
              "description": "Newest first."
            },
            "modified": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "id",
                  "name",
                  "change",
                  "programs",
                  "list",
                  "date"
                ],
                "properties": {
                  "id": {
                    "type": "integer"
                  },
                  "date": {
                    "type": "string",
                    "format": "date",
                    "description": "Date we observed the change."
                  },
                  "list": {
                    "enum": [
                      "sdn",
                      "cons"
                    ],
                    "type": "string"
                  },
                  "name": {
                    "type": "string"
                  },
                  "change": {
                    "enum": [
                      "alias-changed",
                      "programs-changed",
                      "remarks-changed"
                    ],
                    "type": "string"
                  },
                  "programs": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  }
                }
              },
              "description": "Newest first."
            },
            "freshness": {
              "type": "object",
              "required": [
                "dataAsOf",
                "ageDays",
                "stalenessThresholdDays",
                "status"
              ],
              "properties": {
                "status": {
                  "enum": [
                    "complete",
                    "stale",
                    "error"
                  ],
                  "type": "string"
                },
                "ageDays": {
                  "type": [
                    "integer",
                    "null"
                  ],
                  "description": "Whole days from dataAsOf to now."
                },
                "dataAsOf": {
                  "type": "string",
                  "format": "date",
                  "description": "Newest datum: OFAC's publication date."
                },
                "stalenessThresholdDays": {
                  "type": "integer"
                }
              },
              "description": "Same shape as the free /coverage teaser, computed when you called."
            },
            "disclaimer": {
              "type": "string"
            },
            "sourcePublishDate": {
              "type": "string",
              "description": "OFAC list publication date backing this answer (audit trail)."
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object"
          },
          "output": {
            "type": "object"
          }
        }
      },
      "category": "compliance",
      "routeTemplate": "https://x402.professorsausages.com/sanctions-screen/changes"
    },
    "sample": {
      "url": "https://x402.professorsausages.com/sanctions-screen/sample",
      "hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying."
    },
    "catalog": {
      "message": "34 more agent-ready APIs you can call the same way (x402 pay-per-call). Full free catalog at the catalog URL; each serves a FREE real sample record (freeSample link) — taste before you pay. A few you might want:",
      "services": [
        {
          "call": "/token-safety?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Token Safety Check",
          "summary": "On-chain token risk screening for agents",
          "freeSample": "/token-safety/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/address-screen?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Address Risk Screen",
          "summary": "Crypto address risk screening for agents",
          "freeSample": "/address-screen/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/email-check?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Email Deliverability Check",
          "summary": "Part of the Trust & Verification suite — verify anything, pay-per-check",
          "freeSample": "/email-check/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/domain-intel?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Domain Intel (RDAP + DNS)",
          "summary": "Domain registration truth + DNS posture for agents, pay-per-check — part of the Trust & Verification suite…",
          "freeSample": "/domain-intel/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/url-screen?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Malicious URL Screen",
          "summary": "Phishing & malicious-URL screening for agents — hand over any http(s) URL and get a structured risk verdict…",
          "freeSample": "/url-screen/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/phone-check?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Phone Number Validation",
          "summary": "Phone-number validation for agents — is this number real, what region and line type, and its canonical E.16…",
          "freeSample": "/phone-check/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/swap-quote?ref=xsell&v=menu&from=sanctions-screen",
          "name": "DEX Swap Quote",
          "summary": "Read-only on-chain swap pricing for agents",
          "freeSample": "/swap-quote/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/gas-oracle?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Multichain Gas Oracle",
          "summary": "Live multi-chain gas oracle for on-chain agents",
          "freeSample": "/gas-oracle/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/prices?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Crypto Prices (Chainlink)",
          "summary": "Decentralized crypto spot prices + oracle price history for on-chain agents, read DIRECTLY from Chainlink p…",
          "freeSample": "/prices/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/ens-resolve?ref=xsell&v=menu&from=sanctions-screen",
          "name": "ENS Resolver",
          "summary": "Spoof-safe ENS resolution for on-chain agents",
          "freeSample": "/ens-resolve/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/chain-registry?ref=xsell&v=menu&from=sanctions-screen",
          "name": "EVM Chain Registry",
          "summary": "Canonical EVM chain metadata for agents touching an unfamiliar chainId — cleaned, probed, and indexed from…",
          "freeSample": "/chain-registry/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/company?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Company Enrichment (SEC EDGAR)",
          "summary": "Company enrichment for agents — hand over a ticker, CIK, or name and get ground-truth SEC identity plus fin…",
          "freeSample": "/company/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/sec-10k?ref=xsell&v=menu&from=sanctions-screen",
          "name": "SEC Annual Report (10-K)",
          "summary": "U.S",
          "freeSample": "/sec-10k/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/sec-10q?ref=xsell&v=menu&from=sanctions-screen",
          "name": "SEC Quarterly Report (10-Q)",
          "summary": "U.S",
          "freeSample": "/sec-10q/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/sec-8k?ref=xsell&v=menu&from=sanctions-screen",
          "name": "SEC Current Report (8-K)",
          "summary": "U.S",
          "freeSample": "/sec-8k/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/insider-trades?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Insider Trades",
          "summary": "SEC Form 4 insider transactions made agent-ready — who's buying and selling their own company's stock, norm…",
          "freeSample": "/insider-trades/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/13f-holdings?ref=xsell&v=menu&from=sanctions-screen",
          "name": "13F Institutional Holdings",
          "summary": "What every institutional manager actually holds, made agent-ready — normalized SEC 13F-HR portfolios for ~8…",
          "freeSample": "/13f-holdings/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/macro?ref=xsell&v=menu&from=sanctions-screen",
          "name": "US Macro Indicators",
          "summary": "WIP / FREE (BETA) — currently free while data coverage and freshness are expanded; pricing returns once pro…",
          "freeSample": "/macro/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/roadmap?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Roadmap",
          "summary": "FREE — the published edge of this gateway's coverage",
          "freeSample": "/roadmap/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/patent?ref=xsell&v=menu&from=sanctions-screen",
          "name": "US Patent Search",
          "summary": "WIP / FREE (BETA) — currently free; the corpus is a small curated slice of landmark patents while the full…",
          "freeSample": "/patent/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/ipo-calendar?ref=xsell&v=menu&from=sanctions-screen",
          "name": "IPO Calendar",
          "summary": "The US IPO pipeline straight from SEC EDGAR — public domain, no paid feed",
          "freeSample": "/ipo-calendar/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/fx-rates?ref=xsell&v=menu&from=sanctions-screen",
          "name": "FX Reference Rates",
          "summary": "Daily reference FX rates for commerce and accounting agents",
          "freeSample": "/fx-rates/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/holidays?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Market Holiday Calendar",
          "summary": "Deterministic market & bank holiday calendar for finance agents",
          "freeSample": "/holidays/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/iban?ref=xsell&v=menu&from=sanctions-screen",
          "name": "IBAN Validator & Decoder",
          "summary": "IBAN validation & decoding for payment agents",
          "freeSample": "/iban/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/timezone?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Timezone & DST Toolkit",
          "summary": "DST-correct timezone math for scheduling agents",
          "freeSample": "/timezone/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/weather?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Weather & Forecast",
          "summary": "Weather for agents — the canonical tool call, pay-per-use",
          "freeSample": "/weather/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/news?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Multi-Source News",
          "summary": "Multi-source, agent-ready news — headlines, multi-day archive keyword search, and a sentiment timeline over…",
          "freeSample": "/news/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/reader?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Web Reader & Screenshot",
          "summary": "Give your agent a real browser",
          "freeSample": "/reader/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/convert?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Document Convert (PDF/Image → Text)",
          "summary": "Document conversion tools for agents — hand over any PDF or image (public URL, base64, or raw POSTed bytes,…",
          "freeSample": "/convert/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/nft?ref=xsell&v=menu&from=sanctions-screen",
          "name": "NFT Insight (Scam Check, Owners)",
          "summary": "NFT collection intelligence for agents — Ethereum now, Base next",
          "freeSample": "/nft/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/sfx?ref=xsell&v=menu&from=sanctions-screen",
          "name": "8-bit SFX Generator",
          "summary": "Deterministic 8-bit sound-effect synthesis for agents — game-ready WAVs from a seed or preset in one paid c…",
          "freeSample": "/sfx/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/icons?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Icon Search",
          "summary": "Inline SVG icons for agents building UIs without CDN access — CSP blocks icon CDNs and hand-drawn path data…",
          "freeSample": "/icons/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/pokemon?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Pokemon API",
          "summary": "Pokemon knowledge base for agents",
          "freeSample": "/pokemon/sample?ref=xsell&v=menu&from=sanctions-screen"
        },
        {
          "call": "/minecraft?ref=xsell&v=menu&from=sanctions-screen",
          "name": "Minecraft Data",
          "summary": "Minecraft game data for agents — look up any block or item by name with properties, ids and metadata, list…",
          "freeSample": "/minecraft/sample?ref=xsell&v=menu&from=sanctions-screen"
        }
      ],
      "strategy": "menu",
      "catalogUrl": "https://x402.professorsausages.com/?ref=402&v=menu&from=sanctions-screen"
    },
    "suggest": {
      "url": "https://x402.professorsausages.com/suggest",
      "hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first."
    },
    "discount": {
      "off": "50%",
      "hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
      "header": "X-Intent"
    },
    "how_to_pay": {
      "hint": "Wrap the fetch/axios you already use: on a 402 it pays this quote (USDC on Base) and retries. npm i <install>; save code as pay.mjs; BUYER_PRIVATE_KEY=<dedicated wallet key> node pay.mjs",
      "axios": {
        "code": "import axios from\"axios\";import{wrapAxiosWithPayment,x402Client}from\"@x402/axios\";import{registerExactEvmScheme}from\"@x402/evm/exact/client\";import{privateKeyToAccount}from\"viem/accounts\";\nconst c=new x402Client();registerExactEvmScheme(c,{signer:privateKeyToAccount(process.env.BUYER_PRIVATE_KEY)});\nconst{data}=await wrapAxiosWithPayment(axios.create(),c).get(\"https://x402.professorsausages.com/sanctions-screen/changes\");console.log(data);",
        "install": [
          "@x402/axios",
          "@x402/evm",
          "viem",
          "axios"
        ]
      },
      "fetch": {
        "code": "import{wrapFetchWithPayment,x402Client}from\"@x402/fetch\";import{registerExactEvmScheme}from\"@x402/evm/exact/client\";import{privateKeyToAccount}from\"viem/accounts\";\nconst c=new x402Client();registerExactEvmScheme(c,{signer:privateKeyToAccount(process.env.BUYER_PRIVATE_KEY)});\nconst r=await wrapFetchWithPayment(fetch,c)(\"https://x402.professorsausages.com/sanctions-screen/changes\");console.log(await r.json());",
        "install": [
          "@x402/fetch",
          "@x402/evm",
          "viem"
        ]
      },
      "skill": "https://x402.professorsausages.com/skills",
      "key_env": "BUYER_PRIVATE_KEY"
    }
  },
  "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.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x54eb…70d5B. The signed payment is good for 1 minute.

USD Coin contract
0x8335…02913
Payment window
1 minute
As published
20000 smallest units
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://x402.professorsausages.com/sanctions-screen/changes",
    "description": "",
    "maxAmountRequired": "20000",
    "maxTimeoutSeconds": 60
  }
]

Provenance

Seen in the source catalog
2026-09-20 02:03Z
Last indexed by Roundhouse
2026-10-13 01:16Z
Last enriched (probe, favicon, geo)
2026-09-27 01:15Z
x402 version
1
Max timeout
60s
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. 7 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 x402.professorsausages.com 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=x402.professorsausages.com'
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.professorsausages.com/sanctions-screen/changes, 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.