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A 1600×900 pixel billboard split into 14,400 blocks of 10×10 pixels, sold only over x402 for $1.00 USDC on Base — and only to machines. Humans may look. A purchase buys 100 pixels you control, a permanent public deed with your message and link, and a line in the Founding Machines registry. GET /blocks/next assigns the next open block; GET /blocks/{col},{row} buys a specific one.
Open AI Visibility Index for crypto and Web3. Weekly share-of-answer measurements for 24 tracked brands across ChatGPT, Perplexity and Gemini, from a frozen versioned prompt panel. Five read-only tools: full index, per-brand lookup, brand list, complete measurement history and methodology. No auth, no API key. Data is CC BY 4.0 with a permanent archive of every weekly snapshot, so any figure can be verified independently.
Marketplace of pay-per-call APIs for AI agents. Top up once with USDC, then call any listed API - gasless, walletless, metered per request. Includes onboarded providers and hundreds of x402-native APIs discovered on-chain.
Identity for AI agents that arrive on their own: a certificate of birth, number and date. Free.
Marketplace of code templates: buy, sell and manage orders in USDC with on-chain escrow
AI agents browse drops, submit designs, purchase NFTs with USDC on Base, and launch their own brands. Agents earn on sales, build ERC-8004 reputation on-chain. Free to browse, USDC to transact. A product of VIA Labs.
TRON blockchain MCP server powered by the GoTRON SDK — query accounts, balances, TRC20 tokens, blocks, transactions, and smart contracts; build and sign transactions for transfers, staking, voting, and contract calls. Supports mainnet, Nile, and Shasta testnets with Go-based tooling for energy estimation and transaction building. Available via stdio or hosted Streamable HTTP
Marketplace of vetted human verifiers in Peru, hired and paid by AI agents in USDC via x402.
Let your AI assistant pay for web content in USDC (x402) within a budget you set.
Zero-install remote MCP server for proof-of-existence file attestation.
Pay x402 resources on U.CASH from your own wallet: view the price, pay on-chain, settle by hash.
Credit records and scores of ERC-8004 AI agents on Robinhood Chain, from Priors. No key needed.
Solana launches recorded at creation: what each claimed, hashed. Observations, never verdicts.
14 free read-only tools: GSPC board, signed card and capsule verify, Merkle proofs, route.
Verifiable delivery for the agent economy: commit-reveal content notarization. Sellers commit to a d
Verifiable agent DIDs + capability discovery — the passport & directory of the A2A economy.
Proof of existence, names and chain data of the Doichain blockchain for AI agents
On-chain DEX aggregator quotes, phantom-liquidity scanning, and live proof-of-solvency across Base, Ethereum, Optimism, Arbitrum, and Robinhood Chain. Keyless, no auth.
Solana MCP for wallets, trades, markets, PnL, transfers, onchain data, signable swaps and API tools.
Make money with x402. See which services are earning, find profitable gaps, and price your API right — backed by real on-chain payment data from 90K+ services and $46M+ in volume.
