Company data API + MCP server
Every field says where it came from
Attestry is a company and business-contact data API for sales teams, developers and AI agents. There is no dashboard to learn: call the API or connect an agent. Each value comes back with its source, the date it was collected, whether it is verified, and what its licence lets you do with it.
| legal_name | Example Holdings GmbH | verifiedgleif, 2026-10-02 |
| lei | 5299000EXAMPLE000X0 | verifiedgleif |
| country | DE | verifiedgleif |
| status | active | verifiedgleif |
| industry | industrial machinery | unverifiedlicensed vendor |
| employee_range | 201-500 | inferredfrom employee_count |
| revenue_range | null | unavailableno source has it |
↓ scroll for plans, data sources and agent setup
Plans
Pay for records returned
A search that finds nothing, a failed request or a record withheld for privacy reasons costs nothing. Every plan has a fixed monthly allowance; none is sold as unlimited. Prices are provisional while the product is in beta.
Trying the API. No card required.
Get started- 10 requests a minute
- REST API and MCP server
- No batches
- No webhooks
- No business contacts
Individual developers and small projects.
Get started- 60 requests a minute
- REST API and MCP server
- Batches of up to 25
- 1 webhook endpoint
- Business contacts where enabled
Sales teams and agencies.
Get started- 300 requests a minute
- REST API and MCP server
- Batches of up to 100
- 3 webhook endpoints
- Business contacts where enabled
Growing companies with several workflows.
Get started- 600 requests a minute
- REST API and MCP server
- Batches of up to 500
- 10 webhook endpoints
- Business contacts where enabled
Need more? Scale plan
250,000+ credits a month, custom limits and a custom agreement. Write to us.
One credit is a company record from an open register or one e-mail check. A company record from a licensed vendor costs 20 credits; a business contact costs 50.
Use cases
What you can do with it
- Look companies up in official registersSearch and enrich legal entities from the global LEI index and the UK company register: legal name, registered address, status, legal form, registration number.
- Check business e-mail addressesSyntax, the domain's live mail-server records, disposable domains and role addresses. We do not probe mailboxes, and the result says so instead of guessing.
- Find business contacts where the law and the licence allow itProfessional data comes only from licensed vendors, only for countries switched on after legal review (none are switched on in this deployment yet). No personal e-mail addresses, no mobile numbers.
- Hand the work to an AI agentConnect Claude, Claude Code, Cursor or another MCP client. The agent gets the same data, and a clear error instead of an invented answer when a source cannot help.
Our data
The data sources, in the open
This table is generated from the running system, the same list the API returns at GET /v1/sources.
| Source | What it provides | Licence | Kept by Attestry | Here |
|---|---|---|---|---|
| Attestry e-mail checks own |
Syntax validation, live DNS lookup of the domain's mail servers, disposable-domain and role-address detection. No mailbox probing. | Computed by Attestry from public DNS | not stored | enabled |
| GLEIF LEI index open registry |
Legal names, registered and headquarters addresses, legal form, registry number and entity status for legal entities holding an LEI, worldwide. | CC0 1.0 (GLEIF LEI Data Terms of Use) | up to 30 days | enabled |
| UK Companies House open registry |
Registered name, number, status, registered office, incorporation date and SIC codes for companies on the UK register. | Companies House public register data (API terms and developer guidelines) | up to 14 days | not enabled |
| France: Sirene and national company register open registry |
Registered name, SIREN number, status, head-office address, activity code, legal category, workforce band and VAT number for companies registered in France. | Sirene base: Open Licence 2.0 (Etalab). Licence of the search API itself not stated: under review | up to 14 days | awaiting licence review |
| People Data Labs licensed vendor |
Firmographics (industry, headcount, website) and professional profiles (title, seniority, employer, work e-mail) under a commercial licence. | Commercial licence (per signed PDL agreement) | not stored | awaiting contract |
Agents
Search, enrich and check from one connection
Use the REST API from your own stack, or the MCP server from Claude, Claude Code, ChatGPT, Cursor and other agents. Agents are told which fields are verified and which are not, so they do not pass a guess on as a fact.
claude mcp add --transport http attestry \
https://attestry.cashflowedx.com/mcp
> Find companies named "Northwind" registered in
Germany and tell me which records are verified.- Company search in official registers
- Company enrichment, merged across sources
- Business e-mail checks
- Business-contact search and enrichment, where enabled
- Batches and webhooks
- Usage, credits and the source list, free to call
Privacy
Privacy is part of the product
We built the rules into the engine, so no endpoint can skip them.
- Anyone can ask to be left outA confirmed request takes effect immediately across the API and the MCP server. Remove or see my data
- No scraping, no bought listsOnly official registers and vendors whose contract allows this use. A source with unclear permissions is not connected.
- Sole traders are treated as peopleRegister entries for sole proprietors are personal data, so they are left out of company results.
- Not yet reviewed by outside counselThe safeguards are implemented and tested. An independent legal review is planned before commercial launch, and we will not claim a certification we do not hold.
Start with 100 credits a month
No card. Create an account, make a key and call the API, or point your agent at the MCP address.