Sato Hub
x402 merchant

factstamp.agentrails.workers.dev

Developer tools API on Base, paid per request with x402.

  • Endpoints8
  • Price per requestfrom $0.02
  • Outside payers · 7d3
  • Answer 402n/a

Overview

as of 2026-10-08
Seller wallet
0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32
Chains
Base
Hosts
factstamp.agentrails.workers.dev
CategoriesCategoriesAssigned automatically from the seller’s own listing text. A filter hint, not a claim about the service.
Developer tools3Other3Commerce1Market data1
First seen
2026-10-06 · last seen 2026-10-08

What we observed

Paid by 3 outside payers · 7d, observed402 unknown, unknownNot claimed
See the readings

Endpoints

EndpointsDescriptions are the seller's own words from the catalogue and are not checked by us. A listed price is a registration, not an observed charge.
8 registered

  • https://factstamp.agentrails.workers.dev/citation

    Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is ab…

    BaseOther

    $0.02/ request

    2026-10-07

  • https://factstamp.agentrails.workers.dev/package

    Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and ev…

    BaseDeveloper tools

    $0.02/ request

    2026-10-05

  • https://factstamp.agentrails.workers.dev/check

    Check a dated figure you are about to act on against the publisher's own series, and receive verified, stale, contradicted or unknown with the as-of date. Call it before committing a number to a page, deck, model or dec…

    BaseOther

    $0.05/ request

    2026-10-07

  • https://factstamp.agentrails.workers.dev/entity

    Verify whether a legal entity exists and is currently registered, from open primary registers: the GLEIF LEI index, US SEC EDGAR and the Australian Business Register (ABN, ACN, GST, status). Call it before naming a comp…

    BaseMarket data

    $0.10/ request

    2026-10-07

  • https://factstamp.agentrails.workers.dev/bulk

    Check a whole bibliography or dependency manifest in one round trip, before you rely on the list: up to 12 items at a flat US$0.12 — 1 cent an item, against 2 cents for the same lookups one at a time. Every item is answ…

    BaseDeveloper tools

    $0.12/ request

    2026-10-05

  • https://factstamp.agentrails.workers.dev/document

    Call it before you send, file or publish a document that quotes figures, names companies or cites papers. Post the text and every checkable claim comes back verified against dated primary sources, as one signed bundle w…

    BaseOther

    $0.25/ request

    2026-10-05

  • https://factstamp.agentrails.workers.dev/watch

    Buy a standing re-check of one citation or one package version, when an answer has to stay true rather than be true once: re-checked every day for 30 days. US$0.50 the month — 1.7 cents a check, under a 2-cent lookup. T…

    BaseCommerce

    $0.50/ request

    2026-10-05

  • https://factstamp.agentrails.workers.dev/watch/portfolio

    Watch a whole list at once, when a bibliography or a dependency manifest has to stay true: up to 25 citations or package versions re-checked every day for 30 days under one token. US$5 a portfolio — 20 cents a reference…

    BaseDeveloper tools

    $5.00/ request

    2026-10-05

Evidence

as of 2026-10-08

Answers HTTP 402

Answers HTTP 402Method: one unpaid request per listed endpoint. A 402 with a payment payload a client could parse counts. Nothing is paid.

unknown

unknown. We hold no reading for this seller's endpoints.

no reading date

x402-style payments, last 7 days (Base)

x402-style paymentsMethod: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's exact scheme uses. Some non-x402 gasless sends use it too.

3outside payers

14 x402-style payments from 3 distinct payers, $6.69 USDC in the last 7 days (Base, exact read)

window ended 2026-10-08

Payments
14
Payers
3
USDC
6.69

All USDC received at this payout address: $6.69 (includes payments that are not x402)

Reading: x402-style payments to this payout address on Base, exact read of the 7 days to 2026-10-08, every block of the window: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's `exact` scheme uses. Some non-x402 gasless sends use it too; Sato Hub's own payer wallets are left out

By chain

ChainSeller walletEndpointsAnswers 402x402-style payments
Base0xc3bcd24a2b350cc73b8516b2a0539a323b42cc328unknown14 x402-style payments from 3 distinct payers, $6.69 USDC in the last 7 days (Base, exact read)

One seller wallet, each chain read on its own. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.

Pricing

Lowest
$0.02
per request, as registeredas of
Median
$0.11
per request, as registeredas of
Highest
$5.00
per request, as registeredas of

The price each endpoint registered in the x402 catalogue. A listed price is a registration, not an observed charge.

Claim this merchant

Sign a message from the payout address 0xc3bcd2…42cc32 to claim this page or download its payment ledger. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.

Data CC-BY-4.0, attribution: data by satohub.ai. Data as of 2026-10-08. Appearing here is not an endorsement. Check an endpoint with the doctor.