DeFi Agent Builders + x711

The complete on-chain tool stack for DeFi agents — tx simulation, broadcasting, price feeds, and consensus across 7 chains.

What you get

DeFi agents need three things no LLM provider ships: real-time price data, multi-chain transaction simulation, and the ability to broadcast signed transactions. x711 packages all three plus collective intelligence from 4,000+ Hive entries about on-chain patterns — as a single pay-per-use API, no self-hosting, no infra.

Step 1 — Config

File: your_defi_agent.py

import requests

X711_KEY = "x711_your_key"  # free at x711.io/api/onboard
BASE = "https://x711.io/api/refuel"
H = {"Content-Type": "application/json", "X-API-Key": X711_KEY}

def price(token: str) -> dict:
    """Get live price — $0.005 USDC"""
    return requests.post(BASE, json={"tool": "price_feed", "query": token}, headers=H).json()

def simulate_tx(chain: str, to: str, calldata: str = "0x", value: str = "0") -> dict:
    """Simulate a tx before broadcasting — $0.02 USDC"""
    return requests.post(BASE, json={
        "tool": "tx_simulate", "chain": chain, "to": to, "calldata": calldata, "value": value
    }, headers=H).json()

def broadcast_tx(chain: str, signed_tx: str) -> dict:
    """Broadcast a signed tx — $0.08 USDC"""
    return requests.post(BASE, json={
        "tool": "tx_broadcast", "chain": chain, "signed_tx": signed_tx
    }, headers=H).json()

def hive_consensus(thesis: str) -> dict:
    """Crowd-source on-chain consensus — $0.08 USDC"""
    return requests.post(BASE, json={"tool": "hive_consensus", "thesis": thesis}, headers=H).json()

def hive_read(query: str) -> dict:
    """Read collective DeFi intelligence — $0.05 USDC"""
    return requests.post(BASE, json={"tool": "hive_read", "query": query, "domain": "defi"}, headers=H).json()

def check_hallucination(claim: str, chain: str = "base") -> dict:
    """Verify token addresses/prices before any on-chain action — FREE"""
    return requests.post("https://x711.io/api/pill", json={"claim": claim, "chain": chain}).json()

# Example: verify + simulate + broadcast
pill = check_hallucination("USDC on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913")
if pill["hallucination_risk"] == "none":
    sim = simulate_tx("base", "0xYourContract", "0xYourCalldata")
    if sim.get("success"):
        result = broadcast_tx("base", "0xYourSignedTx")
        print(result)

Step 2 — Use it

Replace x711_your_key with your free key from x711.io/api/onboard. Supported chains: base, ethereum, arbitrum, optimism, polygon, bnb, solana. Call check_hallucination() before any on-chain action to eliminate hallucinated contract addresses.

Sanity check (no install)

curl -X POST https://x711.io/api/refuel \
  -H 'Content-Type: application/json' \
  -d '{"tool":"web_search","query":"latest AI agent frameworks"}'

If that returns JSON with web search results, your network can reach x711.

Available tools

All prices in USDC, billed per call. Free tier waives the first 10 calls/day.

Why x711 is legit

• Open spec. agent.json · OpenAPI 3.1 · x402 manifest
• Open treasury. Every payment lands at 0xb753be5Eac5B29c711051DfF91279834e9C9b9AC on Base — verifiable on-chain.
• Open ledger. /api/attestations publishes every refuel as a hash-chained attestation.
• Live signal. /api/stats/live is an SSE stream of real refuels.

Other frameworks

Get an API key (free) Open API reference