Losbeto — Market Data for AI Agents MCP server

Losbeto — LLM gateway + market data for AI agents (x402)

Losbeto on x402-list — monitored uptime

One USDC micropayment per call. No signup, no API keys to manage — the payment is the auth. USDC on Base, Solana or Algorand.

Flagship: an OpenAI-compatible LLM gateway for agents. POST /v1/chat/completions and GET /llm at $0.005/call on live backends, with a free tier at /llm/free and model list at /v1/models. Behind it, 95+ market-data endpoints ($0.003–0.05): FX, equities, commodities, macro calendar, crypto — plus Brazil's official statistics in depth, which nobody else on x402 covers.

Quick start

# free — LLM taste, 5 calls/day
curl "https://api.losbeto.xyz/llm/free?q=hello"

# free — delayed preview of any paid endpoint
curl "https://api.losbeto.xyz/forex-rate?pair=EURUSD&preview=1"

# free — machine-readable plans catalog
curl "https://api.losbeto.xyz/plans"

# paid — IPCA as it was known on 5 Aug 2026 (not as revised since)
curl "https://api.losbeto.xyz/br-asof?series=ipca_12m_pct&date=2026-08-05"
# -> HTTP 402 with the payment challenge; pay and repeat

With an x402 client:

import { wrapFetchWithPayment } from "x402-fetch";

const fetchWithPay = wrapFetchWithPayment(fetch, wallet);
const r = await fetchWithPay("https://api.losbeto.xyz/llm?q=market%20outlook");
console.log(await r.json());

From npm:

npm i -g losbeto-llm   # CLI + client for the LLM gateway (set LOSBETO_EVM_KEY)
npm i losbeto-mcp      # MCP server package

As an MCP server (Claude Desktop, Cursor, Claude Code):

{
  "mcpServers": {
    "losbeto": {
      "url": "https://api.losbeto.xyz/mcp",
      "headers": { "Authorization": "Bearer <credit-key>" }
    }
  }
}

Get a credit key with one on-chain payment: POST https://api.losbeto.xyz/buy-credits.

Plans — one payment, N calls (no settlement latency)

Machine-readable at /plans, human-readable at /pricing. First purchase earns a bonus call, credited to your session token (7 days). The node never discounts list price — it adds value after payment instead.

The Brazil moat: point-in-time official statistics

The problem: the IPCA number you fetch from the Banco Central API today is not the number that was published back then. Official Brazilian series are revised. Any backtest built on the current series silently contains look-ahead bias.

The US has ALFRED for this. Brazil has nothing public.

This node has been recording Brazilian official statistics as they were published, timestamping every reading and signing each day with Ed25519 — continuously, since deploy. That archive cannot be scraped retroactively by anyone, including us.

Series tracked: selicmetapct, cdidailypct, ipca12mpct, igpmmonthpct, usdbrlptax, eur_brl.

The Brazilian primitives (zero upstream, sub-millisecond)

Shortened. The full README is on GitHub.