Text-to-speech
agent402.tools · 666 paid endpoints · listed 2026-10-27
What agents keep asking for that nobody serves yet: aggregated, qualified demand clusters from a live agent-demand board, with caller counts and how long each need has persisted. Use it when a seller or an agent is choosing what to build next and wants unmet demand with evidence instead of guesses.
livelast check 4 days ago
100%valid x402 answers, 72 h
$174.70USDC received on Base, 7 days
118distinct payers, 7 days
80.7score (0-100)
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| POST | 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. | $0.001 | Solana |
| POST | agent402.tools/api/age Compute a precise age (years, months, days) from a birth date to today (or a given date), plus total days. | $0.001 | Solana |
| POST | 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 t | $0.001 | Solana |
| POST | 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 per | $0.001 | Solana |
| POST | 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 Team | $0.001 | Solana |
| POST | 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 | $0.001 | Solana |
| POST | 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 | $0.001 | Solana |
| POST | agent402.tools/api/base-convert Convert an integer between number bases (radix 2-36), e.g. binary↔hex↔decimal. Arbitrary size via BigInt. | $0.001 | Solana |
| GET | agent402.tools/api/base-detect | $0.001 | Base |
| POST | agent402.tools/api/base32 Base32 (RFC 4648) encode or decode text. mode: encode (default) or decode. | $0.001 | Solana |
| POST | agent402.tools/api/base58 Base58 encode or decode text (Bitcoin/IPFS alphabet). mode: encode (default) or decode. | $0.001 | Solana |
| POST | agent402.tools/api/base64 Base64 encode or decode text. mode: encode (default) or decode. Handles URL-safe base64 on decode. | $0.001 | Solana |
| GET | agent402.tools/api/binary-text | $0.001 | Base |
| GET | 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. | $0.001 | Solana |
| GET | 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: | $0.001 | Solana |
| POST | 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/di | $0.001 | Solana |
| GET | agent402.tools/api/braille-convert | $0.001 | Base |
| POST | 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 | $0.001 | Solana |
| POST | 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 contex | $0.001 | Solana |
| POST | 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. | $0.001 | Solana |
| POST | 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. | $0.001 | Solana |
| POST | 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. | $0.001 | Solana |
| POST | agent402.tools/api/calc Safely evaluate an arithmetic expression (+ - * / % ^ and parentheses). No code execution - a real parser, not eval. | $0.001 | Solana |
| POST | 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 + n | $0.001 | Solana |
| POST | agent402.tools/api/card-validate Validate a payment card number (Luhn checksum) and detect the brand. Numbers are not stored or logged. | $0.001 | Solana |
| POST | agent402.tools/api/case Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, lower, UPPER. | $0.001 | Solana |
| GET | 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 mul | $0.001 | Solana |
| GET | 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, | $0.001 | Solana |
| GET | 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 | $0.001 | Solana |
| GET | 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 by | $0.001 | Solana |
| GET | 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 | $0.001 | Solana |
| GET | agent402.tools/api/char-frequency | $0.001 | Base |
| POST | 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 | $0.001 | Solana |
| POST | 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. | $0.001 | Solana |
| POST | agent402.tools/api/color Convert a color between hex, RGB, and HSL. Accepts "#1a2b3c", "rgb(26,43,60)", or "hsl(210,40%,17%)". | $0.001 | Solana |
| GET | agent402.tools/api/color-blindness | $0.001 | Base |
| GET | agent402.tools/api/color-convert | $0.001 | Base |
| GET | agent402.tools/api/color-name | $0.001 | Base |
| GET | agent402.tools/api/color-palette | $0.001 | Base |
| GET | agent402.tools/api/combinatorics | $0.001 | Base |
| POST | 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 actu | $0.001 | Solana |
| GET | agent402.tools/api/constant-compare | $0.001 | Base |
| POST | 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 thi | $0.001 | Solana |
| POST | agent402.tools/api/count Count characters, words, lines, and (optionally) occurrences of a substring in text. | $0.001 | Solana |
| GET | 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- | $0.001 | Solana |
| POST | agent402.tools/api/crc32 CRC-32 checksum of a text string (hex), the IEEE polynomial used by zip/png/gzip. | $0.001 | Solana |
| POST | agent402.tools/api/cron-next Parse a 5-field cron expression and return the next N run times (UTC). | $0.001 | Solana |
| GET | 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). Pa | $0.001 | Solana |
| GET | 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 answe | $0.001 | Solana |
| GET | agent402.tools/api/crypto-trending Trending coins on CoinGecko in the last 24 hours, ranked by user search activity on the site (currently ~15 results). Includes coin id, symbol, market cap rank, | $0.001 | Solana |
| POST | 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. | $0.001 | Solana |
| POST | agent402.tools/api/date-diff Difference between two dates/times in ms, seconds, minutes, hours, days, and a human summary. | $0.001 | Solana |
| GET | 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: I | $0.001 | Solana |
| POST | 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 numbe | $0.001 | Solana |
| POST | agent402.tools/api/decide/execute Run a decision's plan through Agent402: first-party steps run directly, third-party steps are paid on your behalf (paid on Base, or by credits or card) and rela | $0.001 | Base |
| POST | agent402.tools/api/dedupe-lines Remove duplicate lines, preserving first-seen order. Returns the deduped text and how many were removed. | $0.001 | Solana |
| POST | 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 agen | $0.001 | Solana |
| POST | agent402.tools/api/defi-tvl Look up the current Total Value Locked (TVL) for a DeFi protocol via DeFiLlama's public API. Identify the protocol by its DeFiLlama slug (uniswap, aave, lido, e | $0.001 | Solana |
| POST | 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 facto | $0.001 | Solana |
| POST | 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 DeFiLlama's public Yields API (keyl | $0.001 | Solana |
| POST | 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, alignme | $0.001 | Solana |
| GET | agent402.tools/api/dns Live DNS lookup for a domain: returns name, type and records[]. Supported record types: A, AAAA (addresses as strings), MX ({exchange, priority} objects), TXT ( | $0.001 | Solana |
| GET | agent402.tools/api/drug-adverse-events Top reported adverse reactions for a drug from the FDA FAERS database (openFDA), ranked by report count - a fast read on a drug's real-world safety signal. Live | $0.001 | Solana |
| POST | agent402.tools/api/duration Parse a duration like "2h30m" / "1d4h" / "90s" to seconds, or humanize a number of seconds. | $0.001 | Solana |
| POST | agent402.tools/api/easter-date Compute the date of Easter Sunday for a given year using the Anonymous Gregorian algorithm (Meeus/Jones/Butcher). Also returns Good Friday, Ash Wednesday, Palm | $0.001 | Solana |
| GET | agent402.tools/api/edgar-company-lookup Resolve a US stock ticker (e.g. AAPL) to its SEC CIK number, the primitive every other EDGAR call needs. Returns ticker, cik (zero-padded, 0000320193), cikInt ( | $0.001 | Solana |
| POST | agent402.tools/api/effective-annual-rate Convert a nominal annual rate (APR) compounded m times per year into the effective annual rate (EAR / APY): (1 + apr/m)^m - 1. Set continuous:true for e^apr - 1 | $0.001 | Solana |
| POST | agent402.tools/api/email-guard Read one email the way an agent that triages mail should before acting on it: observations with evidence and offsets, no score and no verdict. Send the raw RFC | $0.001 | Solana |
| POST | agent402.tools/api/email-validate Validate an email address: syntax check plus live MX record lookup on the domain (deliverability signal, not a guarantee). | $0.001 | Solana |
| GET | agent402.tools/api/ens-resolve Resolve an ENS name (e.g. vitalik.eth) to its Ethereum address - so an agent can turn a human-readable recipient into a payable address. Read-only on Ethereum m | $0.001 | Solana |
| POST | agent402.tools/api/epoch-convert Convert between Unix epoch timestamps and ISO 8601 date strings in both directions. Provide either an epoch (seconds or milliseconds) or an ISO date string. Ret | $0.001 | Solana |
| POST | agent402.tools/api/feedback Tell this server whether a call you paid for delivered what it promised. Bound to the receipt: give it the settlement transaction from that call's PAYMENT-RESPO | $0.001 | Optimism, eip155:1329, Polygon, eip155:143, Arbitrum, eip155:42220, Avalanche, eip155:4663, eip155:5042, Base |
| GET | agent402.tools/api/feedback/summary What paying buyers said about each tool on this server: good and bad counts and the number of distinct wallets behind them, over a window you choose. Every verd | $0.001 | Solana |
| POST | agent402.tools/api/finance Financial math. op: "compound" (future value of principal at a rate) or "loan" (monthly payment + total for a loan). | $0.001 | Solana |
| POST | agent402.tools/api/forecast-eval Backtest a forecasting method on the input series by holding out the last `testSize` observations, forecasting them, and computing MAPE (mean absolute percentag | $0.001 | Solana |
| POST | agent402.tools/api/forecast-holt Holt's linear trend method - level + trend (no seasonality). Two smoothing parameters: alpha (level) and beta (trend). Forecast extrapolates as a straight line | $0.001 | Solana |
| POST | agent402.tools/api/forecast-holt-winters Holt-Winters triple exponential smoothing - level + trend + seasonal component. Use for series with a repeating cycle (weekly retail traffic, monthly utility us | $0.001 | Solana |
| POST | agent402.tools/api/forecast-naive Three textbook baseline forecasts: mean (forecast = average of history), naive (forecast = last value), drift (linear extrapolation from first to last point). U | $0.001 | Solana |
| POST | agent402.tools/api/forecast-ses Simple exponential smoothing (SES) - level-only forecast for series without trend or seasonality. Higher alpha (closer to 1) tracks recent values aggressively; | $0.001 | Solana |
| GET | 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: return | $0.001 | Solana |
| POST | 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 period | $0.001 | Solana |
| POST | agent402.tools/api/geo-distance Great-circle distance between two latitude/longitude points using the haversine formula. Returns kilometers and miles. Deterministic. | $0.001 | Solana |
| GET | agent402.tools/api/geocode Resolve a free-form address or place name to coordinates: lat/lon, display name, bounding box, place type. OpenStreetMap/Nominatim, no key. | $0.001 | Solana |
| POST | agent402.tools/api/gunzip Decompress a base64-encoded gzip payload. Returns the result as utf8 (text) or base64 (binary). Refuses to expand past 10MB to defend against zip bombs. | $0.001 | Solana |
| POST | agent402.tools/api/gzip Compress a string with gzip (RFC 1952) and return it as base64. Reports input bytes, output bytes, and the compression ratio so you can decide if it was worth d | $0.001 | Solana |
| POST | agent402.tools/api/hash Cryptographic hash of a text string - sha256 (default), sha512, sha1 or md5 - returned as hex and base64. Use it for content fingerprints, integrity checks and | $0.001 | eip155:1329 |
| POST | agent402.tools/api/hex Hex encode or decode text. mode: encode (default) or decode. | $0.001 | Solana |
| POST | agent402.tools/api/hidden-text-scan Check an email or web page for text a person reading it would not see but an AI reading it would: HTML comments, display:none or hidden elements, white-on-white | $0.001 | Solana |
| GET | agent402.tools/api/hkdf-expand | $0.001 | Base |
| POST | agent402.tools/api/hmac HMAC signature of a message with a shared key. Algorithms: sha256 (default), sha512, sha1. Returns hex and base64. | $0.001 | Solana |
| POST | agent402.tools/api/html-entities Encode text to HTML entities or decode them back. mode: encode (default) or decode. | $0.001 | Solana |
| POST | agent402.tools/api/html-links Enumerate every <a href> in an HTML string with its anchor text and rel attribute. Optionally resolves relative hrefs against a base URL and filters by a regex | $0.001 | Solana |
| POST | agent402.tools/api/html-meta Extract <title>, <meta description>, OpenGraph/Twitter cards, canonical URL, and JSON-LD blocks from an HTML string. Distinct from /api/meta which fetches a URL | $0.001 | Solana |
| POST | agent402.tools/api/html-select Run a CSS selector against an HTML string and return the matches (text, attrs, and optionally outerHTML for each). The deterministic alternative to regex when y | $0.001 | Solana |
| POST | agent402.tools/api/html-strip Strip all HTML tags and return plain text. Preserves block-level structure (paragraphs and headings become newline-separated). Faster and more predictable than | $0.001 | Solana |
| POST | agent402.tools/api/html-table Extract a <table> from an HTML string as JSON rows (header-keyed) or CSV. Useful for prices, schedules, sports stats, or anything an agent has already fetched a | $0.001 | Solana |
| POST | agent402.tools/api/html-to-markdown Convert an HTML fragment or document you already have into clean markdown. (To fetch + convert a live URL, use /api/extract.) | $0.001 | Solana |
| POST | agent402.tools/api/http-check Check any public URL: status code, latency, final URL after redirects, and response headers. The uptime primitive for agent monitors. | $0.001 | Solana |
| POST | agent402.tools/api/iban-validate Validate an IBAN: country code, length, and the ISO 13616 mod-97 checksum. | $0.001 | Solana |
| POST | agent402.tools/api/ics-parse Parse iCalendar (.ics) text into structured JSON events: summary, start/end, location, organizer, attendees, status, and RRULE. Optional bounded recurrence expa | $0.001 | Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 4 days ago | agent402.tools/api/a2a-card-fetch | 402 | 525 | valid x402 v2 terms |
Income on Base (7 days)
| Day | Transfers | USDC | |
|---|---|---|---|
| 2026-11-01 | 100 | $1.35 | |
| 2026-10-31 | 421 | $1.64 | |
| 2026-10-30 | 228 | $100.46 | |
| 2026-10-29 | 197 | $1.79 | |
| 2026-10-28 | 319 | $4.57 | |
| 2026-10-27 | 2344 | $58.76 | |
| 2026-10-26 | 226 | $2.33 | |
| 2026-10-25 | 315 | $3.80 |
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x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/agent402.tools