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
- Seller wallet
- 0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0
- Chains
- BaseArbitrumAvalancheCeloMonadOptimismPolygonSei
- Hosts
- agent402.tools
- CategoriesCategoriesAssigned automatically from the seller’s own listing text. A filter hint, not a claim about the service.
- Developer tools1,088Market data872Onchain data704Other577AI models416Web data296Media272Identity240Search144Agents124Security96Commerce16
- First seen
- 2026-10-05 · last seen 2026-10-06
Endpoints
EndpointsDescriptions are the seller's own words from the catalogue and are not checked by us. A listed price is a registration, not an observed charge.https://agent402.tools/api/fred-series-info
Metadata for a FRED series: title, frequency, units, seasonal adjustment, observation date range, and popularity. Use before /api/fred-series to confirm the series fits your needs.
MonadOthern/a/ request
2026-09-30
https://agent402.tools/api/fred-series-info
Metadata for a FRED series: title, frequency, units, seasonal adjustment, observation date range, and popularity. Use before /api/fred-series to confirm the series fits your needs.
CeloOthern/a/ request
2026-09-30
https://agent402.tools/api/fred-series-info
Metadata for a FRED series: title, frequency, units, seasonal adjustment, observation date range, and popularity. Use before /api/fred-series to confirm the series fits your needs.
OptimismOthern/a/ request
2026-09-30
https://agent402.tools/api/fred-series-info
Metadata for a FRED series: title, frequency, units, seasonal adjustment, observation date range, and popularity. Use before /api/fred-series to confirm the series fits your needs.
ArbitrumOthern/a/ request
2026-09-30
https://agent402.tools/api/fred-series-info
Metadata for a FRED series: title, frequency, units, seasonal adjustment, observation date range, and popularity. Use before /api/fred-series to confirm the series fits your needs.
PolygonOthern/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
CeloMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
PolygonMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
ArbitrumMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
MonadMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
AvalancheMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
SeiMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-dashboard
Snapshot of all G10 spot exchange rates quoted against USD (EUR, GBP, JPY, CHF, CAD, AUD, NZD, SEK, NOK) using ECB reference rates. Includes the USD-strength index (simple geometric mean of inverse rates). No params.
OptimismMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
PolygonMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
CeloMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
SeiMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
AvalancheMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
MonadMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
ArbitrumMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-historical
Historical foreign-exchange rate for a specific date using European Central Bank reference rates (via Frankfurter). Returns the rate that was published on (or rolled forward to) the requested date.
OptimismMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
AvalancheMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
PolygonMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
CeloMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
SeiMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
MonadMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
ArbitrumMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-rate
Live currency conversion using European Central Bank reference rates (via Frankfurter). Converts an amount between two currencies and returns the rate and date.
OptimismMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
SeiMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
MonadMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
CeloMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
OptimismMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
AvalancheMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
ArbitrumMarket datan/a/ request
2026-09-30
https://agent402.tools/api/fx-timeseries
Daily FX rates between two currencies across a date window using European Central Bank reference rates (via Frankfurter).
PolygonMarket datan/a/ request
2026-09-30
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
PolygonOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
CeloOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
SeiOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
OptimismOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
AvalancheOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
MonadOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-estimate
Current gas price on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction: returns network, gasPriceGwei and gasPriceWei (decimal strings) f…
ArbitrumOnchain datan/a/ request
2026-10-03
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
SeiOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
CeloOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
OptimismOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
AvalancheOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
MonadOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
ArbitrumOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gas-snapshot
Live gas price snapshot for a chain - slow / standard / fast tiers in gwei, plus the latest base fee. Sampled from eth_feeHistory (last 4 blocks, 25th/50th/90th percentile priority fees). Use to estimate before broadcas…
PolygonOnchain datan/a/ request
2026-10-06
https://agent402.tools/api/gcd-lcm
Greatest common divisor and least common multiple of two or more integers, computed exactly (arbitrary precision). Useful for cycle alignment, scheduling periods and fraction work. Signs are ignored; a zero makes the LC…
SeiOthern/a/ request
2026-10-06
https://agent402.tools/api/gcd-lcm
Greatest common divisor and least common multiple of two or more integers, computed exactly (arbitrary precision). Useful for cycle alignment, scheduling periods and fraction work. Signs are ignored; a zero makes the LC…
AvalancheOthern/a/ request
2026-10-06
https://agent402.tools/api/gcd-lcm
Greatest common divisor and least common multiple of two or more integers, computed exactly (arbitrary precision). Useful for cycle alignment, scheduling periods and fraction work. Signs are ignored; a zero makes the LC…
OptimismOthern/a/ request
2026-10-06
Evidence
Answers HTTP 402
Answers HTTP 402Method: one unpaid request per listed endpoint. A 402 with a payment payload a client could parse counts. Nothing is paid.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)
x402-style paymentsMethod: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's exact scheme uses. Some non-x402 gasless sends use it too.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
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.