x402 resource directory

Find paid HTTP operations and MCP tools by URL, host, method or tool name. Compare payment terms across networks and catalogs.

Distinct HTTP URLs
164,804
Distinct MCP URLs
43
Catalog observations
263,972
URLs with a 402 in 7 days
2,262
Network identifiers
183

These results as JSON

POST https://aep-api.fly.dev/v1/evidence-pack · 2 observations
Find 3-10 scholarly candidates for a question or topic. Returns DOI/OpenAlex IDs, authors, year, venue, source URLs, citation context, open-access location, and known retraction/correction warnings. JSON only. Does not claim that a paper proves a statement.

aep-api.fly.dev profile

  • Base · exact
    $0.0300 (USDC)
    Recipient 0x3bc7011b2ad12c89e768e27c6c27b6548bfc53f5
    Coinbase CDP · seen
    Coinbase CDP reports 5 calls and 3 unique payers in 30 days. Last call .
  • Base · exact
    $0.0300 (USDC)
    agentic.market · seen
GET https://aero.lonestaroracle.xyz/pool · 5 observations
Aerodrome DEX pool risk assessment — checks both tokens for honeypots and rug vectors

AeroCheck profile

  • Base · exact
    $0.0500 (USDC)
    Recipient 0x52Ab53912D37759B2ad364f22dD06B16714b6C06
    PayAI · seen
  • Arc · exact
    $0.0500 (USDC)
    Recipient 0xeF2a4B6756895aAf1374640dcFCD4947959442ab
    Coinbase CDP · seen
    Coinbase CDP reports 3 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0500 (USDC)
    Recipient 0x52Ab53912D37759B2ad364f22dD06B16714b6C06
    Coinbase CDP · seen
  • Solana · exact
    $0.0500 (USDC)
    Recipient 3nmeVj5m9Uq2hSTfsVsn3tJMHRJQNMKR1AjzyUJbrSgw
    Coinbase CDP · seen
  • Base · exact
    $0.0500 (USDC)
    agentic.market · seen
GET https://aeroacepilot.xyz/v1/check · 2 observations
Paid preflight for any AcePilot query on Aerodrome Slipstream pools on Base: would this exact request be answered, at what price, over which block range and with what per-component coverage, before buying the answer. 0.001 USDC (or 1 prepaid credit); free only with an invited developer key. Data and analytics only, not advice.

aeroacepilot.xyz profile

  • Base · exact
    $0.0010 (USDC)
    Recipient 0x08BA157aFc403fc5D41a9772778966D37b472415
    Coinbase CDP · seen
    Coinbase CDP reports 11 calls and 2 unique payers in 30 days. Last call .
  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
GET https://aeroacepilot.xyz/v1/q1 · 1 observation
Concentrated-liquidity range evidence for one Aerodrome Slipstream pool on Base: the narrowest price range that stayed in range for a target share (80/90/95 %) of the last 24-720 h, with in-range %, out-of-range episodes, hourly coverage and block-level evidence from on-chain observations. Useful when choosing or re-centring an LP range. Refused or stale queries return 4xx/503 before any payment.

aeroacepilot.xyz profile

  • Base · exact
    $0.0400 (USDC)
    agentic.market · seen
GET https://aeroallocator.app/api/v1/allocate-plan · 2 observations
Ready-to-sign, already-simulated Aero allocate() transaction for an sAERO position: the best split of Base gauges for its size (fees plus incentives, after its own dilution) as unsigned calldata for the Voter, with the cooldown, expected USD per day versus now, and warnings. Handles the contract's rules (full overwrite, exact total, ascending addresses, idle power). Never signs or sends. Base only. Pass ?tokenId=.

aeroallocator.app profile

  • Base · exact
    $0.1000 (USDC)
    Recipient 0x9b3F205E43dc9FcC1cc2Fe6d9dCD0357769A6Bae
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.1000 (USDC)
    agentic.market · seen
GET https://aeroallocator.app/api/v1/cross-chain-plan · 2 observations
Ordered, ready-to-sign Aero allocate() transactions that spread an sAERO position over gauges on several chains (Base, Ethereum, OP, Arbitrum, Ink, Robinhood, Arc): the best split after each extra chain's ETH cost, or the percentages you give (?chains=5042:30,10:20). Plans from the position's state on every chain, with the ETH to attach, what each step waits for and a simulation of step 1. Never signs or sends. Pass ?tokenId=.

aeroallocator.app profile

  • Base · exact
    $0.2500 (USDC)
    Recipient 0x9b3F205E43dc9FcC1cc2Fe6d9dCD0357769A6Bae
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.2500 (USDC)
    agentic.market · seen
GET https://aeroallocator.app/api/v1/position · 2 observations
Where an Aero sAERO position stands on Base: its voting power and lock, how much is idle or allocated to gauges, when it can next be re-allocated (the wait after any allocation, 47 hours at launch), what it earns per day now versus the best split of gauges for its own size (fees plus incentives, after its own dilution), and a stay / switch / allocate recommendation. Pass ?tokenId= or ?address=. Read-only.

aeroallocator.app profile

  • Base · exact
    $0.0500 (USDC)
    Recipient 0x9b3F205E43dc9FcC1cc2Fe6d9dCD0357769A6Bae
    Coinbase CDP · seen
    Coinbase CDP reports 4 calls and 3 unique payers in 30 days. Last call .
  • Base · exact
    $0.0500 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/api/x402/preflight · 1 observation
x402 endpoint audit: can a paying agent actually pay this API? Probes any x402 URL and validates its 402 payment requirements (CAIP-2 network, USDC asset, payTo checksum, amount, EIP-712 domain, resource URL, Bazaar discovery). Returns pass, warn or fail, a 0-100 score and a fix for every failure

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/allowance · 1 observation
ERC-20 allowance check on Base: how much a spender is still approved to move from an owner's token balance, and whether the approval is unlimited. Run before a swap, an approve or a revoke. Input: token, owner, spender

Aether profile

  • Base · exact
    $0.0020 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/balance · 2 observations
Wallet balance on Base: the native ETH balance of any address, read live from the chain. Input: address

Aether profile

  • Base · exact
    $0.0010 (USDC)
    Recipient 0x2B77a25a8308c30AE37781b8a0D2A21C6211e812
    Coinbase CDP · seen
    Coinbase CDP reports 32 calls and 7 unique payers in 30 days. Last call .
  • Base · exact
    $0.0010 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/basename · 1 observation
Basename lookup: resolve a Base name such as jesse.base.eth to its wallet address, with avatar and profile text records. Input: name

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/block · 1 observation
Base block lookup by number or tag (latest, safe, finalized): timestamp, gas and transaction count

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/call · 1 observation
Simulate a read-only contract call on Base (eth_call) without sending a transaction: returns the raw result or the revert reason. Use it to dry-run a call before signing

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/contract · 1 observation
What is this Base address? Wallet (EOA) or smart contract, code size, proxy implementation address, and whether it is an ERC-20, ERC-721 or ERC-1155 token

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/erc20-balance · 2 observations
ERC-20 token balance of a wallet on Base (USDC or any other token), formatted with symbol and decimals. Input: wallet address and token address

Aether profile

  • Base · exact
    $0.0020 (USDC)
    Recipient 0x2B77a25a8308c30AE37781b8a0D2A21C6211e812
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0020 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/estimate-gas · 2 observations
Estimate the gas and the cost in ETH and USD of a Base transaction before signing it. Input: to, and optionally from, data and value

Aether profile

  • Base · exact
    $0.0020 (USDC)
    Recipient 0x2B77a25a8308c30AE37781b8a0D2A21C6211e812
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0020 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/gas · 1 observation
Current gas price on Base in gwei: base fee, suggested priority fee and max fee per gas, read live from the chain

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/nft-metadata · 1 observation
NFT metadata on Base for an ERC-721 or ERC-1155 token: token URI plus the name, image and attributes it points to, resolved from IPFS, Arweave, data URIs or https

Aether profile

  • Base · exact
    $0.0050 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/nft-owner · 1 observation
Who owns this NFT? Current owner of an ERC-721 token on Base by contract address and token id (ownerOf)

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/portfolio · 1 observation
Wallet portfolio value on Base: ETH plus major tokens (or up to 20 tokens you choose), each holding priced in USD from live DEX prices, with the total. Input: wallet address

Aether profile

  • Base · exact
    $0.0040 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/price · 2 observations
Token price on Base by contract address: live USD price and pool liquidity from Uniswap v2/v3 and Aerodrome. Works for any token with a DEX pool, including newly launched ones

Aether profile

  • Base · exact
    $0.0030 (USDC)
    Recipient 0x2B77a25a8308c30AE37781b8a0D2A21C6211e812
    Coinbase CDP · seen
    Coinbase CDP reports 1 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/receipt · 1 observation
Base transaction receipt by hash: success or reverted, gas used, and the decoded ERC-20 Transfer events showing which tokens moved between which addresses

Aether profile

  • Base · exact
    $0.0030 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/token · 1 observation
Token info for any ERC-20 on Base by contract address: name, symbol, decimals and total supply

Aether profile

  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen
POST https://aether-x402.vercel.app/v1/base/token/risk · 2 observations
Is this Base token safe to buy, or a honeypot, rug pull or scam? Simulates a real buy and sell to prove the token can be sold and to measure buy and sell tax, then checks mint, blacklist, pause and fee powers, proxy upgradeability, owner and DEX liquidity. Input: token address. Returns a verdict (low, caution, high, avoid), a 0-100 risk score and the evidence. Check before an agent trades a token. Try it free first: 3 calls a day at POST /v1/base/token/risk/trial

Aether profile

  • Base · exact
    $0.0100 (USDC)
    Recipient 0x2B77a25a8308c30AE37781b8a0D2A21C6211e812
    Coinbase CDP · seen
    Coinbase CDP reports 5 calls and 1 unique payers in 30 days. Last call .
  • Base · exact
    $0.0100 (USDC)
    agentic.market · seen

Counts describe directory coverage, including testnets. Each resource groups the same URL, HTTP method or MCP tool across sources. A catalog sighting records published terms. A live 402 records the endpoint’s reply to an unpaid request.