Quickstart
Get a key and make your first call in three steps.
MCP server
Connect Claude, ChatGPT, Cursor or your own agent to every Croma tool.
API Reference
Full endpoint reference with a playground.
Sources
Every country and source Croma covers, with guides and examples.
What is Croma?
Croma is the API and MCP server for official government data. Look up a company, a court case or a sanctioned party, or search laws and gazettes, from your own code or straight from Claude and ChatGPT. Eight countries and 80 sources today, from company registries and courts to sanctions lists, public procurement and gazettes. Pick a country to see what it covers.Colombia
33 sources
Mexico
17 sources
Peru
10 sources
Brazil
8 sources
United States
6 sources
Japan
2 sources
Bolivia
2 sources
El Salvador
2 sources
Core concepts
Live lookups
Ask the source when you call and get what it says right now, one subject per request.
Datasets
Query a complete copy Croma keeps up to date, in milliseconds, with
as_of on every response.Async jobs
Long lookups run as jobs you can wait on, poll or receive by webhook.
Batch requests
Resolve many lookups in one request, with a result for each item.
Build with agents
Every endpoint is also a tool on the MCP server, so Claude, ChatGPT, Cursor or your own agent can call it directly. Web search, page extraction and cited research sit beside the government sources.Keys, credits and limits
Every request authenticates with an API key. Credits show what each call costs, rate limits show how fast you can go, and errors lists every status and error code you can branch on.Frequently asked questions
Is the data live or stored?
Is the data live or stored?
Both. Live lookups ask the source when you call and return what it says at that moment. Datasets are complete copies that Croma keeps up to date, so they answer in milliseconds and carry
as_of on every response.Can I use Croma from Claude or ChatGPT?
Can I use Croma from Claude or ChatGPT?
Yes. Connect the MCP server and every endpoint becomes a tool the assistant can call.
What if a source I need is missing?
What if a source I need is missing?
Ask for it in the WhatsApp community and tell us what you need it for.
Getting help
WhatsApp community
Ask questions and request new sources.
Email support
Write to us and we will reply.