x402 merchant

agent402.tools

Developer tools API on Base, Arbitrum, Avalanche, Celo, Monad, Optimism, Polygon and Sei, paid per request with x402.

Endpoints4,845
Price per requestfrom $0.001
Outside payers · 7dn/a
Answer 4020 of 8

Overview

as of 2026-10-06

Seller wallet: 0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0
Chains: BaseArbitrumAvalancheCeloMonadOptimismPolygonSei
Hosts: agent402.tools
Categories: Developer tools1,088Market data872Onchain data704Other577AI models416Web data296Media272Identity240Search144Agents124Security96Commerce16
First seen: 2026-10-05 · last seen 2026-10-06

What we observed

Payments unknownNo 402 answer2026-09-19Not claimed

See the readings

Endpoints

4,845 registered

https://agent402.tools/api/erc721-owner
Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint…
AvalancheOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/erc721-owner
Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint…
ArbitrumOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/erc721-owner
Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint…
PolygonOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/erc721-owner
Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint…
MonadOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
SeiOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
CeloOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
OptimismOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
AvalancheOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
MonadOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
ArbitrumOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/eth-call
Escape hatch for power users: forward an arbitrary read-only JSON-RPC method to the chain. Method must be in our read-only whitelist (eth_call, eth_getLogs, eth_getBlockByNumber, eth_getTransactionReceipt, eth_chainId, …
PolygonOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
SeiOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
OptimismOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
ArbitrumOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
MonadOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
AvalancheOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
CeloOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/event-logs
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at m…
PolygonOnchain data
n/a/ request
2026-09-30
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
CeloOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
OptimismOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
SeiOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
AvalancheOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
MonadOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
ArbitrumOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/evm-rpc
Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover - one paid call, no node or API key of your own. Prefer the named reads (block-number, chain-info, block-in…
PolygonOnchain data
n/a/ request
2026-10-03
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
CeloSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
OptimismSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
SeiSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
AvalancheSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
ArbitrumSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
PolygonSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-answer
Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every…
MonadSearch
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
CeloWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
SeiWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
OptimismWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
ArbitrumWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
AvalancheWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
PolygonWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-contents
Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain…
MonadWeb data
n/a/ request
2026-09-30
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
PolygonSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
CeloSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
OptimismSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
SeiSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
AvalancheSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
MonadSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exa-search
Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', …
ArbitrumSearch
n/a/ request
2026-10-06
https://agent402.tools/api/exchange-rates
BTC-denominated exchange rates for ~60 units: crypto (ETH, LTC, BNB, SOL, ...), fiat (USD, EUR, JPY, ...) and commodities (gold, silver ounces), each as units per 1 BTC with name and type. Optional `currencies` filter (…
CeloMarket data
n/a/ request
2026-10-06
https://agent402.tools/api/exchange-rates
BTC-denominated exchange rates for ~60 units: crypto (ETH, LTC, BNB, SOL, ...), fiat (USD, EUR, JPY, ...) and commodities (gold, silver ounces), each as units per 1 BTC with name and type. Optional `currencies` filter (…
OptimismMarket data
n/a/ request
2026-10-06
https://agent402.tools/api/exchange-rates
BTC-denominated exchange rates for ~60 units: crypto (ETH, LTC, BNB, SOL, ...), fiat (USD, EUR, JPY, ...) and commodities (gold, silver ounces), each as units per 1 BTC with name and type. Optional `currencies` filter (…
SeiMarket data
n/a/ request
2026-10-06
https://agent402.tools/api/exchange-rates
BTC-denominated exchange rates for ~60 units: crypto (ETH, LTC, BNB, SOL, ...), fiat (USD, EUR, JPY, ...) and commodities (gold, silver ounces), each as units per 1 BTC with name and type. Optional `currencies` filter (…
AvalancheMarket data
n/a/ request
2026-10-06

Evidence

as of 2026-10-06

Answers HTTP 402

0 of 8

0 of 8 probed endpoints answered HTTP 402 with a parseable payment payload

checked 2026-09-19

x402-style payments, last 7 days (Base)

unknown

unknown. the 7-day payments read on Base did not complete (ranges over 10000 blocks are not supported on free plan)

window ended 2026-10-06

By chain

Chain	Seller wallet	Endpoints	Answers 402	x402-style payments
Base	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	603	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. the 7-day payments read on Base did not complete (ranges over 10000 blocks are not supported on free plan)
Arbitrum	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet
Avalanche	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet
Celo	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet
Monad	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet
Optimism	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet
Polygon	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet
Sei	0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0	606	0 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-19	unknown. not measured on this chain yet

One seller wallet, each chain read on its own. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.

Pricing

Lowest

$0.001

per request, as registeredas of 2026-10-06

Highest

$2.00

per request, as registeredas of 2026-10-06

The price each endpoint registered in the x402 catalogue. A listed price is a registration, not an observed charge.

Claim this merchant

Sign a message from the payout address 0xabf4fa…e2a9d0 to claim this page or download its payment ledger. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.

Data CC-BY-4.0, attribution: data by satohub.ai. Data: x402-list.com (CC BY 4.0). Data as of 2026-10-06. Appearing here is not an endorsement. Check an endpoint with the doctor.