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.
First tool surface recorded: 21 tools (server version 1.5.0-catalog)
https://companyfacts.dev/mcp (mcp_streamable_http) — from mcp_registry
Added "find_x402_api"; changed the definition of "company_lookup", "company_search", "new_businesses" and 2 more (20 tools before, 21 now)
⟨10 unchanged words⟩ fi, cz, sk, ie, au, us (US entities with an LEI, any state), or global (LEI). Needs name.","type ⟨54 unchanged words⟩
⟨5 unchanged words⟩ track: newly formed New York, Colorado, Oregon, Connecticut andConnecticutPennsylvania businesses with a website found withproof.proof, and every FDIC-insured bank in any state. Filter by state, source, city, name, formation date, technology on ⟨34 unchanged words⟩
⟨94 unchanged words⟩ next page.","type":"integer"},"statesource":{"description":"AnyWhereoftheNY,company
⟨6 unchanged words⟩ business registers of New York, Colorado, Oregon, Connecticut andConnecticutPennsylvania, in one record format. mode new is ⟨118 unchanged words⟩ state), else 'no website found'. New York, Oregon andOregonPennsylvania publish active entities only, so a missing entity there may be inactive or unregistered. Pennsylvania publishes monthly, so its newest entities are weeks old. If one state fails the others still return ⟨7 unchanged words⟩
⟨163 unchanged words⟩ any of NY, CO, OR, CT, PA, comma separated (an array also works). Default allfour.five.","type":"string"},"status":{ ⟨4 unchanged words⟩
⟨9 unchanged words⟩ , with its title and final URL afterredirects.redirects, plus the page's schema.org data (prices, dates) when it has any. robots.txt is honored. Some sites refuse automated readers; those calls fail ⟨6 unchanged words⟩
⟨36 unchanged words⟩ FR, FI, CZ, SK, IE, AUand, the worldwide LEIregister.register, and US entities in any state that hold an LEI (with their state filing number). Companies only, no directors or contact details.
⟨9 unchanged words⟩ fi, cz, sk, ie, au, us, or global for the LEI register.","type" ⟨15 unchanged words⟩ :{"description":"Company name to search for.","type":"string"},"state":{"description":"With country us only: the US state the entity was formed in, two letters (de, ny, tx). Default: any state.","type":"string"}},"required": ⟨4 unchanged words⟩
Find the best x402 API for a task — Say what you need in plain words ('verify an email', 'read a web page', 'company record for a domain') and get the x402 endpoints that do it, best first, ranked only on public facts: wallets that paid it more than once in the last 30 days (Coinbase's CDP catalog), whether it answered our unpaid request with a 402 last night, its price, and PayAI's uptime. Each result has the price, networks, method, and links to re-check every number. No match is never charged.
Added "app_store_lookup", "check_email", "company_lookup" and 13 more; changed the definition of "find_company_board" (4 tools before, 20 now)
Find which applicant-tracking system a company's careers page runs on. Greenhouse, Ashby, Lever andLeverWorkable all publish open job board APIs, and ⟨44 unchanged words⟩
Look up Apple App Store apps — Search the Apple App Store, look apps up by id or bundle id, read customer reviews, or get the top free, paid and grossing charts, per country. Returns name, developer, price, rating, rating count, version, genres and the App Store link.
Check an email address — Is this address worth sending to: syntax, whether the domain exists and has mail servers, and whether it is a throwaway, role (info@, sales@) or free-provider address. It never contacts the mailbox, so a missing mailbox at a real domain still passes, and the answer says so.
Recently observed → Live
Added "job_changes"; changed the definition of "compare_companies", "find_company_board" and "list_open_jobs" (3 tools before, 4 now)
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{"destructiveHint":false,"idempotentHint":true,"openWorldHint":true,"readOnlyHint":true,"title":"Compare several companies' jobs"}before
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{"destructiveHint":false,"idempotentHint":true,"openWorldHint":true,"readOnlyHint":true,"title":"Find a company's job board"}Live → Recently observed
Recently observed → Live
Live → Recently observed
Certificate changed, valid to 2027-01-21
Recently observed → Live
Live → Recently observed
Certificate recorded, valid to 2026-11-22
Authorization not required
Unknown → Live
First tool surface recorded: 3 tools (server version 1.2.0-metered)
https://ats-jobs-api.groundtruthtools.workers.dev/mcp (mcp_streamable_http) — from mcp_registry
Showing the latest 17 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
Everything public about a company — One company in one call, from its domain: registrar, DNS and email provider, the website's tech stack, and hiring from its own job board (open roles by department and place, salary ranges, roles opened or closed lately). Add name and country for the official register entry, or ticker for SEC figures. Each part links to its source; a part with nothing to report says why.
Search the companies we track — Finds companies across everything we track: newly formed New York, Colorado, Oregon and Connecticut businesses with a website found with proof. Filter by state, city, name, formation date, technology on their site (for example Shopify or WordPress), whether they publish a phone, role inbox or contact page, and hiring. Returns register details, website, technologies and job board, newest first. No match is never charged.
Detect a website's tech stack — Fetch one web page and report the technologies behind it (CMS, ecommerce platform, analytics, CDN, web server, frameworks, payment processors, email provider) with a confidence and the evidence for each. Reads HTML, headers, cookies and DNS from one page load; it cannot see what only a running browser reveals.
Look up a domain (registration, DNS, email provider) — For one domain: whether it is registered, its registrar, created, updated and expiry dates, status codes and nameservers (from the registry's RDAP server), plus its A, AAAA, MX, NS and TXT records, the email provider behind its MX, and whether it publishes SPF and DMARC. No registrant names or contact details are returned.
Pull structured data from a page — Read a web page and return the named fields as JSON, using only what the page states; a value the page does not give comes back empty rather than guessed. Name fields, or pass a JSON Schema, or neither for a title, summary and key points. Needs an API key (5 calls from its balance); a failed extraction is refunded.
Federal contract awards and recompetes — Searches awarded US federal contracts on USAspending.gov by agency, keyword and dollar amount, largest first. Recompete mode instead lists contracts expiring soonest within a window (set min_amount to keep the search narrow), with the incumbent and days until expiry. Every record links to the official award page.
Summarise a company's hiring — One company's hiring at a glance: open roles counted by department and by location, remote share, salary ranges per currency where the job board publishes pay, and which roles opened or closed in the last 7 or 30 days from a daily record of every board. Reads the company's live Greenhouse, Ashby, Lever or Workable board. Give a company name, board name or careers URL.
Newly formed US businesses and state register lookup — Searches the official Secretary of State business registers of New York, Colorado, Oregon and Connecticut, in one record format. mode new is a feed of entities formed in a date window, newest first: use it for new-business leads (LLCs and corporations that just registered) and prospecting. mode search finds entities by legal name and mode lookup by the state's own entity number: use them for KYB (know your business) checks on a supplier or counterparty, to confirm it exists, its type, status (active, delinquent, inactive) and formation date. Every record links to the state's own data row. Nev…
Read a web page — Any public web page or PDF as clean markdown, with its title and final URL after redirects. Some sites refuse automated readers; those calls fail with the reason and cost nothing.
Search an official company registry — Searches one country's official company register by name and returns registered companies in one consistent shape: number, legal name, status, legal form, dates, town and postcode, and a link to the register entry. Covers GB, NO, FR, FI, CZ, SK, IE, AU and the worldwide LEI register. Companies only, no directors or contact details.
Search Hacker News — Search Hacker News stories and comments with date, points and comment-count filters, read the live front page and the top, best, new, ask and show lists in rank order, or read whole comment threads. Every item links back to news.ycombinator.com.
Search academic papers — Search the OpenAlex catalogue of scholarly papers by keyword, look papers up by DOI, list the papers that cite one work, or list a university's or journal's papers. Returns title, authors, year, citation count, DOI, abstract and a free full-text link when one exists.
SEC financials and screener — Reads US public company financials from SEC EDGAR XBRL. Company mode returns one company's reported history of a metric (revenue, net income, assets and 20 more, or any us-gaap tag) by ticker or CIK. Screen mode ranks every filer on one metric for one calendar period. Every figure carries period_type and a link to its filing. Reports figures, not advice.
Validate an EU VAT number — Checks one VAT number against the European Commission's VIES service and returns whether it is a live registration and, where the member state shares it, the registered name. Covers the 27 EU states and Northern Ireland (XI). A busy or down member state is reported as an error, never as an invalid number.
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{"destructiveHint":false,"idempotentHint":true,"openWorldHint":true,"readOnlyHint":true,"title":"List a company's open jobs"}Jobs opened, closed or changed — What changed in hiring, day by day: jobs newly posted, taken down, reopened, or edited (title, location or salary), read daily from every job board in the directory. Call it each day with since set to the last day you saw, rather than re-reading every board. Omit companies for the whole market, or filter by kind and title words.