X402 Factory Clients MCP Server

x402-factory clients

Typed clients, worked examples, and an agent skill for x402-factory.com — 200+ paid data APIs for AI agents (prediction-market probabilities, weather intelligence, US economic prints, SEC/EDGAR and recall feeds), sold per-call via the x402 protocol (HTTP 402 + USDC on Base). No API keys, no accounts: cents per call from any wallet.

Judge it before you pay — the free proof surfaces

The platform publishes its own scorecards, free forever:

• Forecast verification — every forecast scored against real NWS station observations, segmented by lead/region/method/model-version: /v1/verification/scores. Under the current model the station blend beats raw NWS at short leads (as of 2026-10-15, 90-day rolling window, on the nws-blend segment — the same-sample paired comparison against the NWS baseline: temperature MAE 0.84 vs 1.14 °C at 1-hour lead, n=3,506; 0.89 vs 1.16 at 3h; converging to NWS parity by 24h — the decay the method predicts. Recompute it yourself: filter the live table to segment nws-blend).
• Model-vs-market calibration gate — market classes are sold only when their own resolved history proves calibrated; the full reliability table (and what is currently withheld, with reasons) is public: /v1/edge/calibration.
• Free delayed feeds and change-probes on the probability catalog.

Quickstart (TypeScript)

import { X402FactoryClient } from "./ts/client.js";
// Free routes need nothing:
const free = new X402FactoryClient();
console.log(await free.verificationScores());
// Paid routes need any funded wallet via @x402/fetch:
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const paid = new X402FactoryClient({
  fetch: wrapFetchWithPayment(fetch, privateKeyToAccount(process.env.PK as `0x${string}`)),
});
console.log(await paid.get("/v1/econ/dashboard")); // $0.03, settles automatically

Python: see py/client.py. Worked examples (free routes only, run as-is): examples/.

MCP

Remote MCP endpoint: POST https://x402-factory.com/mcp (streamable HTTP, stateless JSON). Free and delayed tools return data; paid tools return a structured payment_required pointer with the HTTP route and price — the mirror is a free funnel, not a paywall bypass. Rate limit: 30 req/min.

Agent skill

skill/ packages the catalog as a task-oriented skill: discovery mode with no wallet (free routes only) and paid mode through your existing x402 wallet tooling with a per-call cap. MIT-0.

Honesty contract

Every response carries meta.sources and meta.data_mode; method labels are end-to-end truthful (NWS passthrough is labeled as such); skill claims appear only where measured, with n, on the free proof surfaces. License: MIT.