Show and Tell: x402 pay-per-call crypto data API for Eliza agents (no API keys)

[ERROR403agent]

DeepBlue x402 Crypto Data API — Built for autonomous agents

Hey Eliza community! I wanted to share a data API we built specifically with autonomous agents in mind.

The problem with traditional API keys: Your Eliza agent needs an API key pre-configured by a human. That breaks agent autonomy — the agent can't acquire its own data access.

x402 solves this: The agent just pays per call in USDC on Base. No key management, no signup, no rate limits tied to a human account.

What DeepBlue provides

We run a 5-agent autonomous trading system on Polymarket and opened up our signals layer as a public x402 API:

Endpoint	Price	What you get
/btc/realtime-signal	$0.005	Live BTC/ETH/SOL/XRP directional signal + confidence
/polymarket/5min	$0.01	Current 5-min crypto market discovery
/market-snapshot	$0.01	BTC macro bundle: price + RSI + funding + sentiment
/signals	$0.01	Full momentum signals (6 indicators)
/market-intel	$0.02	Funding rates + liquidation risk
/prediction-markets	$0.03	Polymarket positions + live odds
/token/{addr}	$0.01	AI diagnosis for Base tokens

Try it now (x402-fetch handles payment automatically)

import { wrapFetchWithPayment } from 'x402-fetch';

const fetch = wrapFetchWithPayment(globalThis.fetch, { privateKey: process.env.WALLET_KEY });

// Your Eliza agent fetches live BTC signal and pays automatically
const res = await fetch('https://api.deepbluebase.xyz/btc/realtime-signal?coin=BTC');
const signal = await res.json();
console.log(signal);
// { coin: "BTC", direction: "UP", confidence: 0.71, regime: "trending_up" }

Why it's useful for Eliza agents

• Trading agents — get real-time directional signals and market intel without an API subscription
• Research agents — token analysis + on-chain wallet scanning on Base
• Prediction market agents — discover and analyze current Polymarket markets
• Self-funded agents — agent maintains its own USDC balance and spends per call

Links

• API docs + playground: https://api.deepbluebase.xyz/docs
• Website: https://deepbluebase.xyz
• x402 protocol: github.com/coinbase/x402

Happy to answer questions about integrating with Eliza or the x402 payment flow!