Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Added "nft_collection_activity", "nft_collection_compare", "nft_collection_due_diligence" and 2 more (72 tools before, 77 now)
NFT Collection Activity — Live transfer feed of an NFT collection with per-address accumulation analysis: net quantities received vs sent over recent activity, ranking the buyers adding to positions and the wallets exiting. The actionable view behind the raw transfer list. Use this when an agent needs to who is accumulating and who is exiting — right now. x402 price $0.003/call (USDC, eip155:8453).
NFT Collection Comparison — Compare any two NFT collections on the full due-diligence metric set: supply, holders, holder ratio, top-10 concentration, wash-trading score and activity trend — with a winner per metric. The head-to-head an agent runs before recommending one collection over another. Use this when an agent needs to two collections side-by-side, metric by metric verdicts. x402 price $0.005/call (USDC, eip155:8453).
NFT Collection Due Diligence — Full on-chain due-diligence report for any NFT collection: mint supply, unique holders, top-10 ownership concentration with a verdict, wash-trading indicators from transfer patterns, and recent activity trend. Read straight from the chain — the check an agent runs before its human buys. Use this when an agent needs to the Carfax for NFT collections — holders, concentration, wash signals. x402 price $0.02/call (USDC, eip155:8453).
NFT Holder Distribution — Top holders of any NFT collection with exact quantities, individual and cumulative ownership percentages, and concentration statistics — the distribution picture agents need before valuing or recommending a collection. Use this when an agent needs to who owns the collection, and how concentrated is it. x402 price $0.005/call (USDC, eip155:8453).
Wallet NFT Portfolio — Look up an address's NFT portfolio across collections: each collection held, quantity owned, sorted by size. The enrichment endpoint for agents profiling wallets — pairs with wallet-snapshot for the full picture. Use this when an agent needs to every NFT collection a wallet holds, in one call. x402 price $0.002/call (USDC, eip155:8453).
Added "crypto_new_pools", "crypto_tx_explain", "dev_api_health_check" and 4 more; changed the definition of "calculators_age_calculator", "calculators_bmi_calculator", "calculators_compound_interest_calculator" and 62 more (65 tools before, 72 now)
⟨20 unchanged words⟩ Reference date defaults to today (UTC).—Use this when an agent needs to exact age in years, months and days. x402 price $0.001/call (USDC, eip155:8453).
⟨16 unchanged words⟩ the healthy BMI weight range for your height.—Use this when an agent needs to body Mass Index with WHO category. x402 price $0.001/call (USDC, eip155:8453).
Certificate recorded, valid to 2026-11-27
Authorization not required
Unknown → Live
First tool surface recorded: 65 tools (server version 0.1.0)
https://agenttools-hub.vercel.app/api/mcp (mcp_streamable_http) — from mcp_registry, with the record
Showing the latest 7 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
⟨16 unchanged words⟩ or daily compounding and see total interest earned.—Use this when an agent needs to future value with any compounding frequency. x402 price $0.002/call (USDC, eip155:8453).
⟨14 unchanged words⟩ and in calendar years, months and days.—Use this when an agent needs to days, weeks and calendar time between two dates. x402 price $0.001/call (USDC, eip155:8453).
⟨12 unchanged words⟩ and percent-off discount, with the working shown.—Use this when an agent needs to sale price and savings from a percent off. x402 price $0.001/call (USDC, eip155:8453).
⟨20 unchanged words⟩ liter — with optional cost splitting between passengers.—Use this when an agent needs to trip fuel and cost, splitable between people. x402 price $0.001/call (USDC, eip155:8453).
⟨20 unchanged words⟩ repaid and total interest (annuity formula).—Use this when an agent needs to monthly payment, total cost and interest for any loan. x402 price $0.002/call (USDC, eip155:8453).
⟨14 unchanged words⟩ between two values — with step-by-step working shown.—Use this when an agent needs to percent of a number, ratios and percent change. x402 price $0.001/call (USDC, eip155:8453).
⟨16 unchanged words⟩ minute — the typical silent-reading speed for adults.—Use this when an agent needs to how long a text takes to read, by word count. x402 price $0.001/call (USDC, eip155:8453).
⟨14 unchanged words⟩ pays when splitting. Defaults to a 15% tip.—Use this when an agent needs to tip amount, total and per-person split. x402 price $0.001/call (USDC, eip155:8453).
⟨21 unchanged words⟩ in, or override with any custom rate.—Use this when an agent needs to add or remove VAT at standard rates for 36 countries. x402 price $0.001/call (USDC, eip155:8453).
⟨9 unchanged words⟩ hectares, acres, square feet and square miles.—Use this when an agent needs to square meters, feet, acres, hectares. x402 price $0.001/call (USDC, eip155:8453).
⟨18 unchanged words⟩ ×1024) — both systems side by side.—Use this when an agent needs to decimal (KB/MB/GB) and binary (KiB/MiB/GiB) units. x402 price $0.001/call (USDC, eip155:8453).
⟨14 unchanged words⟩ , yards, feet, inches and nautical miles.—Use this when an agent needs to metric and imperial distance units, instantly. x402 price $0.001/call (USDC, eip155:8453).
⟨15 unchanged words⟩ that rejects non-standard forms like IIIM or VX.—Use this when an agent needs to numbers ↔ Roman numerals, with validation. x402 price $0.001/call (USDC, eip155:8453).
⟨12 unchanged words⟩ knots and feet per second with exact definitions.—Use this when an agent needs to km/h, mph, m/s, knots and ft/s. x402 price $0.001/call (USDC, eip155:8453).
⟨11 unchanged words⟩ (freezing and boiling water) and step-by-step working.—Use this when an agent needs to celsius, Fahrenheit and Kelvin, both ways. x402 price $0.001/call (USDC, eip155:8453).
⟨13 unchanged words⟩ automatically; invalid dates are rejected with clear errors.—Use this when an agent needs to epoch seconds ↔ human dates, both directions. x402 price $0.001/call (USDC, eip155:8453).
⟨14 unchanged words⟩ , cups, fluid ounces, tablespoons and teaspoons.—Use this when an agent needs to liters, gallons, cups, milliliters. x402 price $0.001/call (USDC, eip155:8453).
⟨12 unchanged words⟩ , ounces and stones with exact international definitions.—Use this when an agent needs to kilograms, pounds, ounces and more. x402 price $0.001/call (USDC, eip155:8453).
⟨21 unchanged words⟩ USD. Exact BigInt math for the wei amounts.—Use this when an agent needs to transaction cost in ETH and USD from gas × gwei. x402 price $0.001/call (USDC, eip155:8453).
⟨22 unchanged words⟩ btc, eth, sol…). Cached 60 seconds.—Use this when an agent needs to live token prices and 24h change via CoinGecko. x402 price $0.002/call (USDC, eip155:8453).
⟨21 unchanged words⟩ modulo bias). Never use Math.random for secrets.—Use this when an agent needs to cSPRNG passwords, hex keys and uniform integers. x402 price $0.001/call (USDC, eip155:8453).
⟨36 unchanged words⟩ this address?' conclusion, not raw RPC data.—Use this when an agent needs to on-chain wallet profile: balance, activity, tokens, counterparties. x402 price $0.005/call (USDC, eip155:8453).
⟨15 unchanged words⟩ strings of any magnitude convert without floating-point error. Use this when an agent needs to exact Ethereum unit conversion — no float errors. x402 price $0.001/call (USDC, eip155:8453).
⟨26 unchanged words⟩ 404 NANP codes in use, including overlays.—Use this when an agent needs to all 404 NANP area codes → state lookup. x402 price $0.001/call (USDC, eip155:8453).
⟨22 unchanged words⟩ up a single country or list by region.—Use this when an agent needs to 250 countries: codes, capitals, currencies, populations. x402 price $0.002/call (USDC, eip155:8453).
⟨30 unchanged words⟩ page history, finding deleted content and due-diligence.—Use this when an agent needs to how the Internet Archive remembers a URL. x402 price $0.002/call (USDC, eip155:8453).
⟨10 unchanged words⟩ Full UTF-8 support including emoji and non-Latin scripts.—Use this when an agent needs to uTF-8 safe base64 in both directions. x402 price $0.001/call (USDC, eip155:8453).
⟨13 unchanged words⟩ kebab-case and CONSTANT_CASE. camelCase boundaries are split automatically.—Use this when an agent needs to camelCase, snake_case, kebab-case and more. x402 price $0.001/call (USDC, eip155:8453).
⟨21 unchanged words⟩ 'when does this cron actually fire?' without guessing.—Use this when an agent needs to explain a cron expression and compute the next runs. x402 price $0.001/call (USDC, eip155:8453).
⟨20 unchanged words⟩ unlike asking a model to 'find the differences'.—Use this when an agent needs to exact line-level diff with unified-style output. x402 price $0.002/call (USDC, eip155:8453).
⟨31 unchanged words⟩ an API exists, ask for the capability.—Use this when an agent needs to "I need a tool that does X" → matched paid APIs. x402 price $0.002/call (USDC, eip155:8453).
⟨29 unchanged words⟩ typos and fake domains that pure regex misses. Use this when an agent needs to syntax + live MX check — can this address receive mail?. x402 price $0.001/call (USDC, eip155:8453).
⟨22 unchanged words⟩ guard; handles both RSS 2.0 and Atom dialects.—Use this when an agent needs to any feed → clean JSON items, no XML parsing on your side. x402 price $0.002/call (USDC, eip155:8453).
⟨21 unchanged words⟩ — identical input always yields the identical digest.—Use this when an agent needs to sHA-256 / SHA-512 / SHA-1 / MD5, exact digests. x402 price $0.001/call (USDC, eip155:8453).
⟨17 unchanged words⟩ or list a whole category (1xx–5xx).—Use this when an agent needs to look up any HTTP status code's meaning. x402 price $0.001/call (USDC, eip155:8453).
⟨17 unchanged words⟩ title, start/end, location, organizer and description.—Use this when an agent needs to turn .ics calendar files into clean event JSON. x402 price $0.002/call (USDC, eip155:8453).
⟨11 unchanged words⟩ and inspect its top-level type and element counts.—Use this when an agent needs to validate, pretty-print and inspect JSON. x402 price $0.001/call (USDC, eip155:8453).
⟨23 unchanged words⟩ like exp and iat are rendered as dates. Use this when an agent needs to decode header and payload — no verification. x402 price $0.001/call (USDC, eip155:8453).
⟨25 unchanged words⟩ Meta). Batch multiplier included for monthly estimates.—Use this when an agent needs to tokens × current per-model prices = USD. x402 price $0.001/call (USDC, eip155:8453).
⟨22 unchanged words⟩ font and multipart types used in web APIs.—Use this when an agent needs to content-Type lookup by type or file extension. x402 price $0.001/call (USDC, eip155:8453).
⟨29 unchanged words⟩ expressions resolve against a reference moment you control.—Use this when an agent needs to "next friday 3pm" → exact ISO dates. x402 price $0.001/call (USDC, eip155:8453).
⟨18 unchanged words⟩ BigInt precision (no limit on magnitude). Use this when an agent needs to binary, octal, decimal, hex — any base 2–36. x402 price $0.001/call (USDC, eip155:8453).
⟨32 unchanged words⟩ scanned images need OCR (not included). Use this when an agent needs to extract readable text from any PDF — agents can't read PDFs. x402 price $0.003/call (USDC, eip155:8453).
⟨19 unchanged words⟩ splits — the standard preparation step before embedding.—Use this when an agent needs to rAG-ready chunks with token budgets and overlap. x402 price $0.002/call (USDC, eip155:8453).
⟨12 unchanged words⟩ phone numbers and domains. Deduplicated, categorized, machine-ready.—Use this when an agent needs to pull emails, URLs, IPs, phones and domains from raw text. x402 price $0.002/call (USDC, eip155:8453).
⟨33 unchanged words⟩ budgeting and cost math, with zero dependencies.—Use this when an agent needs to approximate token counts per LLM family, ±10%. x402 price $0.001/call (USDC, eip155:8453).
⟨12 unchanged words⟩ percent-encoded text back. Uses the standard encodeURIComponent rules.—Use this when an agent needs to percent-encoding for query strings and URLs. x402 price $0.001/call (USDC, eip155:8453).
⟨19 unchanged words⟩ and credentials. Exact — no guessing by eye.—Use this when an agent needs to break any URL into protocol, host, path and params. x402 price $0.001/call (USDC, eip155:8453).
⟨35 unchanged words⟩ with redirects re-validated, 10s timeout, 1MB cap.—Use this when an agent needs to fetch any page and get clean markdown an LLM can read. x402 price $0.005/call (USDC, eip155:8453).
⟨13 unchanged words⟩ any UUID's format, version and variant bits.—Use this when an agent needs to random v4, sortable v7, plus strict validation. x402 price $0.001/call (USDC, eip155:8453).
⟨20 unchanged words⟩ years — the standard way to annualize returns.—Use this when an agent needs to compound annual growth rate, time-normalized. x402 price $0.001/call (USDC, eip155:8453).
⟨18 unchanged words⟩ — with the pretty-printed grouping returned when valid.—Use this when an agent needs to structure, length and mod-97 checksum validation. x402 price $0.001/call (USDC, eip155:8453).
⟨24 unchanged words⟩ — the two numbers people constantly mix up.—Use this when an agent needs to profit margin vs markup, both computed. x402 price $0.001/call (USDC, eip155:8453).
⟨9 unchanged words⟩ percentage return relative to the initial amount invested.—Use this when an agent needs to return on investment as a percentage. x402 price $0.001/call (USDC, eip155:8453).
⟨18 unchanged words⟩ public holidays (via Nager.Date) are excluded too.—Use this when an agent needs to working days between dates, optionally minus public holidays. x402 price $0.001/call (USDC, eip155:8453).
⟨16 unchanged words⟩ validation, email deliverability pre-checks and infrastructure discovery.—Use this when an agent needs to real DNS records via Cloudflare DNS-over-HTTPS. x402 price $0.002/call (USDC, eip155:8453).
⟨28 unchanged words⟩ day by the ECB, cached one hour.—Use this when an agent needs to live ECB reference rates for 30 currencies. x402 price $0.002/call (USDC, eip155:8453).
⟨43 unchanged words⟩ ,"ZAR"],"type":"string"},"date":{"description":"YYYY-MM-DD — ECB business days","type":"string"},"from":{"description":"Convert from","enum ⟨79 unchanged words⟩ ","base","from","to","amount","date"],"type":"object"}
⟨15 unchanged words⟩ and whether they're nationwide. Essential for scheduling agents.—Use this when an agent needs to upcoming public holidays for ~110 countries. x402 price $0.002/call (USDC, eip155:8453).
⟨19 unchanged words⟩ owner and currency. Cached 24 hours per IP.—Use this when an agent needs to where is an IP address? Country, city, ASN, timezone. x402 price $0.002/call (USDC, eip155:8453).
⟨20 unchanged words⟩ it whenever an agent needs to know 'now'. Use this when an agent needs to the current date/time in any time zone — agents have no clock. x402 price $0.0005/call (USDC, eip155:8453).
⟨18 unchanged words⟩ URI, with configurable size and error-correction level.—Use this when an agent needs to any text or URL as a QR code (SVG + PNG data URI). x402 price $0.002/call (USDC, eip155:8453).
⟨33 unchanged words⟩ networks are blocked, 10s timeout, 1MB cap.—Use this when an agent needs to title, description, OG image and favicon of any page. x402 price $0.003/call (USDC, eip155:8453).
⟨18 unchanged words⟩ coordinates. No API key, cached 30 minutes.—Use this when an agent needs to current conditions + 3-day forecast for any city. x402 price $0.002/call (USDC, eip155:8453).
New Pool Scanner — Scan newly created DEX pools on Solana, Base, Ethereum, BSC, Arbitrum or Polygon, filtered by minimum liquidity and maximum age. Each pool comes with liquidity (USD), 24h volume, FDV, buy/sell counts and automatic risk flags (too fresh, thin liquidity, sell pressure). Powered by GeckoTerminal's public API. Use this when an agent needs to fresh DEX launches with liquidity, volume and risk flags. x402 price $0.003/call (USDC, eip155:8453).
Transaction Explainer — Explain what an EVM transaction would actually do: decodes the calldata (ERC-20 transfers/approvals via known ABIs, unknown selectors via the 4byte directory) and simulates the call against live chain state to report the outcome — including unlimited-approval warnings — without sending anything. Use this when an agent needs to decode and simulate a transaction — before signing it. x402 price $0.005/call (USDC, eip155:8453).
API Health Check — Probe a GET endpoint several times and report status codes and latency statistics (min/avg/max). The cheap way for an agent to verify an API — for example one found on the x402 Bazaar — responds before spending real money calling it. Use this when an agent needs to status and latency stats — test an API before relying on it. x402 price $0.002/call (USDC, eip155:8453).
Domain Availability Check — Check whether a domain name is registered or available, via the official RDAP registry protocol (404 = available). For registered domains it also returns the registrar and creation/expiration dates — useful when an agent needs to name a product or verify how long a business has existed. Use this when an agent needs to is this domain taken? Registry answer, not a landing page. x402 price $0.001/call (USDC, eip155:8453).
Page Claim Verifier — Verify a claim about a web page's content: fetches the page (SSRF-guarded) and reports whether the expected text appears, with the surrounding excerpt as evidence. The deterministic way for an agent to confirm 'the site says X' before acting on it. Use this when an agent needs to does this page actually say that? Checked, not guessed. x402 price $0.002/call (USDC, eip155:8453).
Table Extractor — Extract every HTML table from a page (or raw HTML) as structured JSON: headers and rows kept intact. The deterministic answer to 'get the pricing table / comparison table / stats table from this page' — no vision model needed. Use this when an agent needs to hTML tables → structured JSON rows and columns. x402 price $0.003/call (USDC, eip155:8453).
User-Agent Parser — Parse a User-Agent header into structured data: browser (name/version), rendering engine, operating system, and device type/vendor/model. Deterministic — the same string always parses identically. Use this when an agent needs to uA string → browser, engine, OS and device. x402 price $0.001/call (USDC, eip155:8453).