# Tensorust

Checks a claim against the public record and returns the evidence with every
figure linked to its source. It says the record does not support a finding
rather than inventing one.

Sources: USAspending federal contracts, Senate LDA lobbying, NIH RePORTER
grants, SEC EDGAR, openFDA, CISA Known Exploited Vulnerabilities, PubMed.

## Agents: pay per answer over HTTP 402 (x402, USDC on Base, no account)

GET https://tensorust-site.vercel.app/api/oath?q=<claim>               $0.05
    Under Oath evidence receipt. Optional: entity, metric
    (contracts | lobbying | grants | financials | fda | cyber), amount.
    INSUFFICIENT_EVIDENCE answers are not charged.

GET https://tensorust-site.vercel.app/api/counterfactual?topic=<topic>&claim=<optional>   $0.10
    PubMed sources for a topic plus the sources that discuss its myths and
    controversies. Source retrieval only, no automatic verdict. Searches that
    find nothing are not charged.

How to pay:
1. Call with no payment. You get 402 with terms in the PAYMENT-REQUIRED
   header (network eip155:8453, USDC, payTo
   0x5f2dAbA9EA8B95d86195412A24F3Ab0168791696).
2. Sign with any x402 client and retry the identical GET with
   PAYMENT-SIGNATURE.
3. The answer is built, the payment settles, then the answer is sent with a
   PAYMENT-RESPONSE header. If settlement fails nothing is sent.

Example (npm i @x402/fetch @x402/evm viem):

  import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
  import { ExactEvmScheme } from "@x402/evm";
  import { privateKeyToAccount } from "viem/accounts";

  const account = privateKeyToAccount(process.env.PRIVATE_KEY);
  const pay = wrapFetchWithPaymentFromConfig(fetch, {
    schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(account) }],
  });
  const r = await pay("https://tensorust-site.vercel.app/api/oath?q=" +
    encodeURIComponent("Did Pfizer get more than $10B in federal contracts?"));
  console.log(await r.json());

Machine-readable manifest: https://tensorust-site.vercel.app/.well-known/agent

## More agent-payable services by the same maker

https://the-wall-lime.vercel.app/agents