API Online — v2.9.0

984 Web3 API Endpoints.
No API Keys. Free Tier.

The identity API that AI agents can trust and pay for autonomously. ENS resolution, Farcaster profiles, wallet analytics, DeFi data — all with x402 micropayments. 100 free calls/day, then pay-per-request with USDC on Base.

🧪 Try API Free → 🤖 Get Agent Identity 📚 Quick Start
  • 984
    API Endpoints
  • 53
    Categories
  • $0.005
    Starting Price
  • 🛡️ ERC-8004 Verified
  • ⚡ x402 Protocol
  • 💎 Base Network
  • 🔵 CDP Powered
  • 📦 npm SDK
  • 🔐 SIWE Auth
20+ Free Endpoints + 100 Free Calls/Day
No wallet needed • Try it free • SIWE for 2x rate limits

⚡ Quick Start — 2 Minutes

Start making requests immediately. No signup, no API keys required.

1 Try It Free (100 calls/day)

bash 
curl https://api.web3identity.com/api/ens/resolve/vitalik.eth

Returns the resolved Ethereum address for any ENS name.

2 Install SDK (Auto x402 Payments)

javascript 
import { ATVClient } from '@atv-eth/x402-sdk';

const client = new ATVClient({
  privateKey: process.env.WALLET_KEY  // USDC on Base for payments
});

// Automatically handles 402 → payment → response
const profile = await client.getProfile('vitalik.eth');
// { name, address, avatar, records, followers, following, ... }

3 Optional: SIWE for 2x Rate Limits

javascript 
// Sign in with Ethereum for 200 free calls/day
await client.signIn();

// All requests now authenticated
const data = await client.getProfile('nick.eth');
const usage = await client.myUsage();  // Check your usage stats
📖 Full API Docs 📦 npm Package 🎮 Live Demo

🆔 Get Your Web3 Identity

Claim your personal .aboutme.eth subname — works everywhere ENS works

yourname.aboutme.eth

  • ✅ First one FREE
  • ✅ Works in any ENS-enabled app
  • ✅ Instant setup — no gas fees
  • ✅ Add avatar, bio, social links
  • ✅ From $0.97/year for additional names
🎉 Claim Your Free Subname →

👩‍💻 Know a Developer?

They'll love this: 984 endpoints, one API. ENS, Farcaster, Lens, DeFi data. Free tier + pay-per-request. No monthly fees.

📦 Official SDK

Install the official SDK for seamless x402 payment integration

npm @atv-eth/x402-sdk View on npm →
npm install @atv-eth/x402-sdk

🤖 Add to Your Agent

One-click configurations for popular AI frameworks

🧠 OpenAI Plugin

GPT Actions
{ "schema_version": "v1", "name_for_model": "web3_identity_api", "name_for_human": "Web3 Identity API", "description_for_model": "Look up Web3 identities: ENS profiles, Farcaster, Lens, wallet analytics, DeFi data. Supports the full Web3Identity API. Use for ENS resolution, social graphs, token balances, NFTs.", "description_for_human": "Web3 identity lookup - ENS, social, wallets", "auth": { "type": "none" }, "api": { "type": "openapi", "url": "https://api.web3identity.com/openapi.json" }, "logo_url": "https://web3identity.com/og-image.png" }

🦜 LangChain

JavaScript / TypeScript
import { ATVClient } from '@atv-eth/x402-sdk'; import { DynamicStructuredTool } from '@langchain/core/tools'; import { z } from 'zod'; const client = new ATVClient({ privateKey: process.env.WALLET_KEY }); const tools = [ new DynamicStructuredTool({ name: "web3_identity", description: "Look up Web3 identity (ENS, social, wallet)", schema: z.object({ name: z.string().describe("ENS name or address") }), func: async ({ name }) => { const profile = await client.getProfile(name); return JSON.stringify(profile); } }) ];

🛠️ API Services

53 categories of endpoints for Web3 identity, social, analytics, and security

Standard New Free Auth Required

Identity & ENS

ENS resolution, profiles, avatars, valuations, batch lookups, contenthash, text records

/profile /ens /reverse /avatar /ens-value /expiration /portfolio /ens/available /ens/expiry /ens/bulk

$0.005 - $0.08 per call

Wallet Analytics

Multi-chain balances, tokens, transactions, NFTs, wallet age and nonce

/balance /tokens /txs /transfers /nfts /wallet/age /wallet/nonce

$0.010 - $0.030 per call

Security

Contract security scans, rugpull detection, token safety via GoPlus

/security/token /security/address /security/approval /security/nft

$0.020 - $0.050 per call

Contract Tools

Fetch ABIs, decode calldata, verify signatures, contract code check

/abi /contract /decode /verify-sig /contract/code

$0.010 - $0.050 per call

Blockchain Data

46 chains: gas prices, block data, network stats, L2 data, chain metadata

/block /block/:number /eth/price /chains /gas

FREE - $0.010 per call

SIWE Authentication

Sign-In with Ethereum for enhanced rate limits and usage tracking

/auth/siwe/nonce /auth/siwe/verify /auth/siwe/session /auth/siwe/logout /api/me /api/me/usage

FREE • 2x rate limits when authenticated

Discovery

AI recommendations, leaderboards, badges, trending names

/recommend /leaderboard /badges /trending

$0.010 - $0.030 per call

Free Endpoints

Always free: health, status, gas, chains, analytics, timestamp, SIWE auth

/health /block /chains /timestamp /usage /analytics /auth/* /api/me*

Always FREE • 20+ endpoints

DeFi Analytics

TVL, yields, protocols, stablecoins, lending rates, DEX volumes, bridges

/defi/tvl /defi/yields /defi/protocols /defi/stablecoins /defi/lending /defi/dex

$0.010 - $0.030 per call • 200+ endpoints

Token Prices

Real-time prices for 100+ tokens: ETH, BTC, stables, DeFi, memecoins

/price/eth /price/btc /price/batch /price/history /market/trending

$0.005 - $0.020 per call • 80+ endpoints

Protocol Data

Stats for Aave, Uniswap, Lido, Compound, MakerDAO, GMX, and 70+ protocols

/protocol/aave /protocol/uniswap /protocol/lido /protocol/gmx /protocols/list

$0.010 - $0.030 per call

💡 Why Pay When Data Is Free?

Raw data is free. Intelligence is valuable.

Unified Identity

Unified API for ENS, Farcaster, Lens, and The Graph. One SDK, consistent patterns, no juggling multiple APIs.

Instant Access

No API keys, no OAuth, no accounts, no billing dashboards. Just pay per request with USDC and start building immediately.

Agent-Native

Built for AI agents. x402 payments mean your bot can authenticate itself and pay without human intervention.

Trust Scoring

We correlate data across platforms to compute trust scores. Raw APIs don't tell you if someone is trustworthy — we do.

Normalized Data

Consistent JSON schemas across all platforms. No parsing different formats from Farcaster vs Lens vs The Graph.

Micropayments

Pay $0.005 per call, not $99/month for a tier you'll never use. True usage-based pricing via x402.

💰 Simple Pricing

Pay per request. No monthly fees. No API keys.

🎁 Free Tier

$0
  • ✅ 100 free API calls per day
  • ✅ No wallet needed
  • ✅ SIWE for 2x limits
Try Free →

🏢 Enterprise

Custom
  • ✅ Volume discounts
  • ✅ SLA guarantee
  • ✅ Dedicated support
  • ✅ Custom endpoints
Contact Us →

Endpoint Pricing

Category Price Range Endpoints
🎁 Free$0.0020+
🪪 Identity & ENS$0.005 - $0.0828
👥 Social & Reputation$0.010 - $0.03037
💰 Wallet Analytics$0.010 - $0.03030
🔐 Security$0.020 - $0.05015
📜 Contract Tools$0.010 - $0.05022
⛓️ Blockchain$0.00 - $0.01080
🔑 SIWE Auth$0.006
🔍 Discovery$0.010 - $0.03018
📈 DeFi Analytics$0.010 - $0.03091
💲 Token Prices$0.005 - $0.02064
🏛️ Protocols$0.010 - $0.03082
📊 Yields & Staking$0.010 - $0.03059
🔄 DEX & Volume$0.010 - $0.03081
💵 Stablecoins$0.010 - $0.02031
🌉 Bridges$0.010 - $0.03020
🔧 Utilities$0.00 - $0.010250

📚 Developer Resources

Everything you need to integrate

Documentation

Guides, tutorials & API reference

docs.web3identity.com →

OpenAPI Spec

Machine-readable spec

/openapi.json →

Postman Collection

Ready-to-import

/postman →

npm SDK

TypeScript support

@atv-eth/x402-sdk →

System Status

Health & uptime monitoring

/status →

GitHub

Source code & examples

github.com/ATV-eth →

❓ Frequently Asked Questions

Everything you need to know about Web3 Identity API

What is Web3 Identity API?

Web3 Identity API helps apps know who they're dealing with. When someone connects their wallet, you get a hex address like 0x1234... which tells you nothing. Our API provides endpoints for ENS resolution, social profiles (Farcaster, Lens), transaction history, and security risk assessment — all through one unified SDK.

How much does it cost?

Free tier: 100 API calls per day, no payment required.
Pay-per-request: From $0.005 per call using USDC on Base. No monthly fees, no commitments. You only pay for what you use.

Do I need crypto to use the API?

Not for the free tier! You get 100 calls/day without any payment. For higher volume, you'll need USDC on Base network for pay-per-request billing via the x402 protocol.

What data sources do you support?

We aggregate data from 15 sources including ENS, Farcaster, Lens Protocol, The Graph, DefiLlama, CoinGecko, and many more. One API, 984 endpoints, all the Web3 data you need.

Can AI agents use this API?

Absolutely! We're designed for AI agents. Use our SDK or integrate via direct API calls. The x402 payment protocol enables autonomous payments without human intervention.

What is aboutme.eth?

aboutme.eth is our ENS subname service. Get your own Web3 identity like yourname.aboutme.eth — first one free, then from $0.97/year. Instant setup, works everywhere ENS works.

🔐 Try SIWE Authentication

Experience Sign-In with Ethereum on our AboutMe.eth service

Connect your wallet, sign a message, prove you're you. No passwords, no accounts — just cryptographic proof.

Try SIWE on AboutMe.eth →

Claim a free subname while you're there: yourname.aboutme.eth

📬 Contact

Reach out via your preferred channel

Email

Email ATV

X / Twitter

@ATV_eth

XMTP

chat.atv.eth

ENS

atv.eth