Agent Tools

Data tools for AI agents and developers, behind one HTTP API and one MCP server. Answers are cached, so repeat requests come back from the cache.

Tools

HTTP

curl "https://api.openkrill.app/v1/tools/job-boards/run?companies=greenhouse:airbnb&maxJobsPerCompany=5"

No key is needed. Calls without one are limited to 20 a minute and 200 tool calls a day per network, and a limit is answered with HTTP 429 and Retry-After. An API key, sent in x-api-key, is optional and lifts those limits.

Every response says whether it was a cache HIT, MISS or STALE. A request that takes too long is answered with a job id and a poll URL, and the finished result is then served from that URL.

MCP

Point an MCP client at https://api.openkrill.app/mcp (streamable HTTP, no key needed; an optional key in x-api-key lifts the limits). tools/list returns the tools that are live; YouTube transcripts join them soon.

For agents

The same information in plain text: /llms.txt.

ChatGPT plugins

Company Jobs Finder answers questions like "is Notion hiring designers?" inside ChatGPT, from the same public job boards. Its MCP server is https://jobs.openkrill.app/mcp and needs no key.

Document Tools counts words, characters and SMS segments and makes calendar (.ics) and CSV files inside ChatGPT, with a download link that works for 24 hours. Its MCP server is https://docs.openkrill.app/mcp and needs no key.

Tax Numbers answers US federal tax questions inside ChatGPT: brackets, the standard deduction, mileage rates, retirement limits, deadlines and a simple estimate, each figure with the IRS document it came from. Its MCP server is https://tax.openkrill.app/mcp and needs no key. It is not tax advice.

Store Price Tracker answers "track competitor prices on this store" and "what did this store change?" inside ChatGPT, from the public product feed that Shopify stores publish. Its MCP server is https://stores.openkrill.app/mcp and needs no key.

Shop Duty Desk answers "what EU duty applies to these order lines?" and "which products in my Shopify inventory export have no HS code?" inside ChatGPT, from the EU customs rule for low-value consignments, the UK and US tariffs and your CSV. Its MCP server is https://shopduty.openkrill.app/mcp and needs no key.

Catalog QA Desk answers "will this Shopify CSV import cleanly?" and "which products fail Google Merchant Center checks or have no image alt text?" inside ChatGPT, from your product CSV or a store's public product feed. Its MCP server is https://catalogqa.openkrill.app/mcp and needs no key.

Startup Name Check answers "is acme.com available?" or "find an available .com for my bakery name" inside ChatGPT, from the public registration lookup (RDAP) of each domain's registry. Its MCP server is https://names.openkrill.app/mcp and needs no key.

Recall Check answers questions like "does my 2018 Honda Accord have any recalls?" or "was there a recall on this infant formula?" inside ChatGPT, from the public NHTSA, CPSC and FDA recall data (US only, not a safety guarantee). Its MCP server is https://recalls.openkrill.app/mcp and needs no key.

Citation Checker answers "are these references real?" and "has this paper been retracted?" inside ChatGPT, from Crossref, the DOI system and OpenAlex. Its MCP server is https://citations.openkrill.app/mcp and needs no key.

Travel Check answers "what is the travel advice for Thailand?" or "is JFK delayed right now?" inside ChatGPT, from UK GOV.UK travel advice, US State Department advisories, the FAA and the Aviation Weather Center. Its tools are get_travel_advice, get_airport_status and compare_advisories, and its MCP server is https://travel.openkrill.app/mcp with no key.

Food Facts answers "what is in the product with barcode 3017620422003?" or "does this product contain milk?" inside ChatGPT, from the Open Food Facts database. Its tools are lookup_barcode, search_products, compare_products and check_allergens, and its MCP server is https://food.openkrill.app/mcp with no key. Entries are community-contributed, so the physical label always wins.

Car Check answers "what car is this VIN?", "any recalls on a 2018 Toyota Camry?" or "what mpg does a 2022 RAV4 hybrid get?" inside ChatGPT, from the US NHTSA and EPA. Its tools are decode_vin, get_vehicle_report, list_recalls and get_fuel_economy, and its MCP server is https://cars.openkrill.app/mcp with no key. It covers US vehicles, lists recalls by model rather than VIN, and is not a valuation, history report or advice.

Business Days and Holidays answers "how many working days between 14 July and 18 August in Germany?", "what date is 37 business days after 11 August in England?" and "what are the public holidays in Bavaria?" inside ChatGPT, from the Nager.Date and OpenHolidays calendars, and says how it counted. Its MCP server is https://businessdays.openkrill.app/mcp and needs no key.

Tariff Code Finder answers "what is the tariff code for a ceramic flower pot in the UK?" and "what is the US duty on HTS 8507.60.00?" inside ChatGPT, from the UK Trade Tariff and the US Harmonized Tariff Schedule. The codes it finds are candidates, not a binding classification. Its MCP server is https://tariffs.openkrill.app/mcp and needs no key.

EU Business Check answers "is DE 811128135 a valid VAT number?" and "what is the LEI of Siemens AG?" inside ChatGPT, from the European Commission VIES service, the GLEIF LEI index and the French and Norwegian company registers. It shows names only for legal entities, never a private person. Its MCP server is https://eubusiness.openkrill.app/mcp and needs no key.

Rules Lookup answers "what does 21 CFR 11.10 say?" and "what has the FDA proposed on food dyes?" inside ChatGPT, from the Electronic Code of Federal Regulations and the Federal Register. It is general information, not legal advice. Its MCP server is https://rules.openkrill.app/mcp and needs no key.

Site Check answers "does this site let AI crawlers in?", "which share tags is my page missing?" and "where does this link redirect to?" inside ChatGPT. It reads only the public robots.txt and page head of a site you name, never a private network address. It is a report on what a site says, not a security scan. Its MCP server is https://sitecheck.openkrill.app/mcp and needs no key.