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 2026-10-07

Seller wallet: 0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0
Chains: BaseArbitrumAvalancheCeloMonadOptimismPolygonSei
Hosts: agent402.tools
Categories: Developer tools1,088Market data872Onchain data704Other577AI models416Web data296Media272Identity240Search144Agents124Security96Commerce16
First seen: 2026-10-05 · last seen 2026-10-07

What we observed

Payments unknownNo 402 answer2026-09-19Not claimed

See the readings

Endpoints

4,845 registered

https://agent402.tools/api/irr
Compute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods.…
PolygonDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/irr
Compute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods.…
ArbitrumDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/irr
Compute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods.…
MonadDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/irr
Compute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods.…
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/irr
Compute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods.…
OptimismDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/irr
Compute the internal rate of return (IRR) of a cashflow stream - the discount rate at which NPV = 0. Index 0 is treated as t=0 (typically the negative initial investment); indices 1..n are inflows in subsequent periods.…
CeloDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
OptimismDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
MonadDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
CeloDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
AvalancheDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
ArbitrumDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/isbn-validate
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
PolygonDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
CeloOther
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
SeiOther
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
AvalancheOther
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
MonadOther
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
ArbitrumOther
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
OptimismOther
n/a/ request
2026-09-30
https://agent402.tools/api/iso-week
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
PolygonOther
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
MonadDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
ArbitrumDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
OptimismDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
AvalancheDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
PolygonDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-diff
Deep-compare two JSON values. Returns a list of changed/added/removed paths (capped at 1000 differences).
CeloDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
AvalancheDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
ArbitrumDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
OptimismDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
MonadDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
CeloDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-flatten
Flatten nested JSON to dot-path keys, or unflatten dot-path keys back to nested JSON. mode: flatten (default) | unflatten.
PolygonDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
OptimismDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
CeloDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
MonadDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
PolygonDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
ArbitrumDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-format
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and str…
AvalancheDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
MonadDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
PolygonDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
ArbitrumDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
CeloDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
OptimismDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-merge
Deep-merge two JSON objects (b wins on conflicts; arrays are concatenated).
AvalancheDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-pointer
Resolve an RFC 6901 JSON Pointer (e.g. /items/0/name) against a JSON value. Returns the value or found:false.
SeiDeveloper tools
n/a/ request
2026-09-30
https://agent402.tools/api/json-pointer
Resolve an RFC 6901 JSON Pointer (e.g. /items/0/name) against a JSON value. Returns the value or found:false.
MonadDeveloper tools
n/a/ request
2026-09-30

Evidence

as of 2026-10-07

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 2026-10-07

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 2026-10-07

Highest

$2.00

per request, as registeredas of 2026-10-07

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 2026-10-07. Appearing here is not an endorsement. Check an endpoint with the doctor.