agent402.tools

• https://agent402.tools/api/add-time

  Add (or subtract) a duration to a date. duration like "2d", "-3h", "1w 2d", "90m". Returns the resulting UTC ISO timestamp.

  SolanaOther

  $0.001/ request

  2026-11-03

• https://agent402.tools/api/age

  Compute a precise age (years, months, days) from a birth date to today (or a given date), plus total days.

  SolanaDeveloper tools

  $0.001/ request

  2026-11-04

• https://agent402.tools/api/amortization

  Build the full per-period amortization schedule for a fully-amortizing loan. Each row reports the period number, payment, the principal vs. interest split for that payment, and the remaining balance after that payment.

  SolanaOther

  $0.001/ request

  2026-11-05

• https://agent402.tools/api/annuity

  Present and future value of a level annuity (equal periodic payments). Supports an ordinary annuity (payments at period end) and an annuity-due (payments at period start).

  SolanaOther

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/asn-info

  Look up the Autonomous System (ASN), prefix, country, registry, and allocation date for an IPv4 address - or for a hostname (which is resolved first). Uses a free public DNS-based IP→ASN mapping service; no HTTPS upstre…

  SolanaIdentity

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/b20-feature-id

  Pure-CPU helper: turn a B20 feature string (e.g. base.b20_asset) into its bytes32 feature id and ready-to-send isActivated(bytes32) calldata for the Activation Registry. No network egress.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/barcode-decode

  Decode a barcode or QR code from an image. Send a base64 PNG or JPEG (or a data: URL); returns the decoded text and the symbology. Reads QR, DataMatrix, and 1D barcodes (EAN/UPC/Code39/Code128/ITF/Codabar). Deterministi…

  SolanaMedia

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/base-convert

  Convert an integer between number bases (radix 2-36), e.g. binary↔hex↔decimal. Arbitrary size via BigInt.

  SolanaMedia

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/base32

  Base32 (RFC 4648) encode or decode text. mode: encode (default) or decode.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/base58

  Base58 encode or decode text (Bitcoin/IPFS alphabet). mode: encode (default) or decode.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/base64

  Base64 encode or decode text. mode: encode (default) or decode. Handles URL-safe base64 on decode.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/block-info

  Header-level detail for one block on Ethereum, Base, Polygon, Arbitrum, or Optimism: hash, timestamp (unix + ISO), transaction count, gas used/limit, base fee. Pass a block number, 0x hex, or "latest". Keyless multi-end…

  SolanaOnchain data

  $0.001/ request

  2026-11-04

• https://agent402.tools/api/block-number

  The latest block number on Ethereum, Base, Polygon, Arbitrum or Optimism from keyless public nodes with fallback. Use it as the cheapest possible on-chain read: a liveness check for a chain, a timestamp anchor for a que…

  SolanaOnchain data

  $0.001/ request

  2026-11-04

• https://agent402.tools/api/bond-price

  Price a fixed-coupon bond from its yield to maturity: present-value the coupons plus face. Returns clean price, coupon per period, current yield, and premium/discount vs par.

  SolanaMarket data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/break-even

  Break-even point for a product: the units and revenue at which total revenue covers fixed plus variable costs. Also returns contribution margin and margin ratio.

  SolanaCommerce

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/brotli-compress

  Compress a string with Brotli (RFC 7932) and return it as base64. Brotli typically beats gzip by 15-25% on text - useful when bytes matter (e.g. cramming context into an LLM prompt, fitting under a transport cap). Slowe…

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/brotli-decompress

  Decompress a base64-encoded Brotli payload. Returns the result as utf8 (text) or base64 (binary). Refuses to expand past 10MB to defend against zip bombs.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/business-days

  Count business days (Mon–Fri) between two dates, inclusive of the start, exclusive of the end. Optional list of holiday dates to skip.

  SolanaOther

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/cagr

  Compound annual growth rate between a beginning and ending value over N years: (end/begin)^(1/years) - 1. Also returns total growth over the whole period.

  SolanaOther

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/calc

  Safely evaluate an arithmetic expression (+ - * / % ^ and parentheses). No code execution - a real parser, not eval.

  SolanaOther

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/captcha-generate

  Mint a stateless captcha challenge to gate your OWN endpoint: returns a human prompt plus a salted sha256 answer hash you keep and verify later (sha256(salt + normalized answer) === answerHash) - no server state, no sha…

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/card-validate

  Validate a payment card number (Luhn checksum) and detect the brand. Numbers are not stored or logged.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/case

  Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, lowercase and UPPERCASE.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/chain-info

  One-call chain state snapshot: chain id, latest block number, and current gas price (wei + gwei) for Ethereum, Base, Polygon, Arbitrum, or Optimism. Keyless multi-endpoint failover.

  SolanaOnchain data

  $0.001/ request

  2026-11-04

• https://agent402.tools/api/chain/nonce

  The transaction count of an account, which is the nonce its next transaction must carry. Ask for block "pending" to include transactions already in the mempool, which is what you want before signing; the default "latest…

  SolanaOnchain data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/chain/pending

  The chain's pending block: how many transactions are queued for the next block, the base fee they will pay, and the gas already used against the limit. This is the node's own view of what is about to be mined, so it ans…

  SolanaOnchain data

  $0.001/ request

  2026-11-04

• https://agent402.tools/api/chain/storage

  Read one 32-byte storage slot from a contract, the raw state under whatever the source code calls it. Returns the word as hex plus three readings of the same bytes - unsigned integer, address (low 20 bytes) and boolean …

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/chain/total-supply

  The circulating total supply of an ERC-20, read from the token contract itself rather than from an aggregator, so it is the number the chain holds at the block you asked for. Returns the raw uint256 and the same figure …

  SolanaOnchain data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/checksum

  Compute MD5, SHA-1, SHA-256, SHA-512, and CRC32 checksums of a string in a single call. Useful for verifying file or payload integrity across different checksum standards without needing five separate tools.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/cidr

  Parse an IPv4 CIDR block: network address, broadcast, first/last host, netmask, and host count. Optionally test if an IP is inside it.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/color

  Convert a color between hex, RGB, and HSL. Accepts "#1a2b3c", "rgb(26,43,60)", or "hsl(210,40%,17%)".

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/compress-compare

  Run the same input through gzip, brotli, and raw deflate at max settings and report each one's output size and ratio. Use this to decide which algorithm to actually use - the answer depends on your content (binary often…

  SolanaMedia

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/correlation

  Pearson correlation coefficient between two equal-length numeric series. Returns r (the correlation, -1 to 1), r² (variance explained), n (sample size). Use this to ask things like: is a stock's daily return correlated …

  SolanaMarket data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/count

  Count characters, words, lines, and (optionally) occurrences of a substring in text.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/country-info

  Country facts by name or ISO code: official name, capital, region, currencies, languages, timezones, dialing code, TLD, and more. Committed open dataset (world-countries, ODbL, plus the IANA timezone country map) - offl…

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/crc32

  CRC-32 checksum of a text string (hex), the IEEE polynomial used by zip/png/gzip.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/cron-next

  Parse a 5-field cron expression and return the next N run times (UTC).

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/crypto-orderbook

  L2 order-book snapshot for a spot pair: best bid/ask, mid price, spread (absolute + %), and the top N aggregated price levels per side (default 25, max 100). Pairs use BASE-QUOTE format (BTC-USD, ETH-USD, SOL-USDC). Rea…

  SolanaMarket data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/crypto-price

  Live spot price for one or many coins in any quote currency: last price, 24h change, 24h volume and market cap per coin, from a maintained market feed and answered in under a second. Use it when an agent needs a current…

  SolanaMarket data

  $0.001/ request

  2026-11-07

• https://agent402.tools/api/crypto-trending

  Trending coins in the last 24 hours, ranked by user search activity on the market-data site (currently ~15 results). Includes coin id, symbol, market cap rank, current price (BTC-denominated), and score. Useful signal f…

  SolanaMarket data

  $0.001/ request

  2026-11-04

• https://agent402.tools/api/csv-lint

  Validate CSV structure: consistent column counts across rows, properly closed quotes, delimiter detection. Returns row/column counts and any structural errors. Pure CPU.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/date-diff

  Difference between two dates/times in ms, seconds, minutes, hours, days, and a human summary.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/date-format

  Parse a datetime from any format (ISO 8601, Unix timestamp in seconds or milliseconds, RFC 2822, or natural date string) and return it in every common format: ISO 8601, Unix (seconds), Unix (ms), RFC 2822, date-only, ti…

  SolanaDeveloper tools

  $0.001/ request

  2026-10-31

• https://agent402.tools/api/day-of-year

  Get the day number within the year (1-366) for any date, plus days remaining, leap-year status, percent of year complete, and a simple (Sunday-start) week number.

  SolanaOther

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/dedupe-lines

  Remove duplicate lines, preserving first-seen order. Returns the deduped text and how many were removed.

  SolanaDeveloper tools

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/defi-dex-volume

  Decentralized exchanges ranked by 24h spot volume with 7d, 30d, 1y and all-time volume, change, the chains each trades on and sector totals. Use it when an agent needs to know where onchain spot volume is happening or h…

  SolanaOnchain data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/defi-tvl

  Look up the current Total Value Locked (TVL) for a DeFi protocol from an open DeFi analytics API. Identify the protocol by its slug (uniswap, aave, lido, ethena, etc.). Returns the total TVL plus per-chain breakdown and…

  SolanaOnchain data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/dex-pair

  Look up the Uniswap V3 pool address for a token pair + fee tier on Ethereum, Base, Polygon, Arbitrum, or Optimism. Pass either order (tokenA/tokenB) - the factory sorts internally. Returns 0x0…0 if no pool has been depl…

  SolanaOnchain data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/dex-top-pools

  Top DEX pools (Uniswap, Sushi, Curve, Aerodrome, etc.) ranked by current TVL - filterable by chain and project. Sourced from an open DeFi analytics yields API (keyless). Each row carries chain, project slug, symbol pair…

  SolanaOnchain data

  $0.001/ request

  2026-10-27

• https://agent402.tools/api/dmarc-check

  Fetch and validate a domain's DMARC policy at _dmarc.<domain> (RFC 7489). Surfaces the enforcement policy (none/quarantine/reject), reporting addresses, alignment modes, and common misconfigs (no rua, p=none stuck for m…

  SolanaIdentity

  $0.001/ request

  2026-10-27

By chain

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.

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