# Mattermark GraphQL API

**Canonical:** https://apis.io/apis/mattermark/mattermark-graphql-api/  
**Provider:** Mattermark — https://apis.io/providers/mattermark/  
**Base URL:** https://eapi.mattermark.com/  
**Documentation:** https://developer.mattermark.com/graphql

Mattermark GraphQL API is one of 7 APIs that [Mattermark](https://apis.io/providers/mattermark/) publishes on the [APIs.io](https://apis.io/) network. The published artifact set on APIs.io includes API documentation and authentication docs.

GraphQL access to the Mattermark dataset using the Mattermark Search Filter Language (MSFL) for complex company and investor queries. Read-only: the published schema declares 57 types under a single RootQuery and no mutation type. Organizations model both companies and investors, discriminated by companyPersona / investorPersona.

## Machine-readable artifacts (5)

- **GraphQL** — https://raw.githubusercontent.com/api-evangelist/mattermark/refs/heads/main/graphql/mattermark.graphql
- **Documentation** — https://developer.mattermark.com/graphql
- **Documentation** — https://docs.mattermark.com/graphql_api/index.html
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/mattermark/refs/heads/main/authentication/mattermark-authentication.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/mattermark/refs/heads/main/apis.yml

## Other Mattermark APIs (6)

- [Mattermark Companies API](https://apis.io/apis/mattermark/mattermark-companies-api/)
- [Mattermark Complex Queries API](https://apis.io/apis/mattermark/mattermark-complex-queries-api/)
- [Mattermark Funding Events API](https://apis.io/apis/mattermark/mattermark-funding-events-api/)
- [Mattermark Investors API](https://apis.io/apis/mattermark/mattermark-investors-api/)
- [Mattermark Search API](https://apis.io/apis/mattermark/mattermark-search-api/)
- [Mattermark Utilities API](https://apis.io/apis/mattermark/mattermark-utilities-api/)

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/mattermark/mattermark-graphql-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/mattermark/.