Mattermark

aid: mattermark
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mattermark.png
name: Mattermark
description: Mattermark is a business-intelligence platform for data-driven deal making, providing profiles on roughly four
  million companies and twenty million key contacts along with their investors, funding events, and news. Relaunched as an
  independent company, Mattermark exposes its dataset through a REST API (api.mattermark.com) and a GraphQL API (eapi.mattermark.com),
  both authenticated with a Bearer API key and queryable with the Mattermark Search Filter Language (MSFL). Originally an
  a16z / Slow Ventures / Version One Ventures-backed startup, it is tracked in the API Evangelist network as a company profile.
url: https://raw.githubusercontent.com/api-evangelist/mattermark/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- slow-ventures
- version-one-ventures
x-tier: profiled
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-08-14'
tags:
- Company
- Business Intelligence
- Company Data
- Investors
- Funding
- Sales Intelligence
- Market Research
apis:
- name: Mattermark REST API
  description: RESTful access to Mattermark company, investor, funding-event, news and personnel data, with page-based pagination
    and MSFL query endpoints.
  humanURL: https://developer.mattermark.com/reference
  baseURL: https://api.mattermark.com/
  properties:
  - type: OpenAPI
    url: openapi/mattermark-rest-api-openapi.yml
  - type: Documentation
    url: https://developer.mattermark.com/docs
  - type: Documentation
    name: Mattermark REST API docs (docs.mattermark.com)
    url: https://docs.mattermark.com/rest_api/index.html
  - type: APIReference
    url: https://developer.mattermark.com/reference
  - type: SourceCode
    name: First-party OpenAPI/Swagger repository
    url: https://github.com/Mattermark/mattermark-openapi
  - type: Authentication
    url: authentication/mattermark-authentication.yml
  - type: Overlay
    url: overlays/mattermark-rest-api-overlay.yaml
  - type: Conventions
    url: conventions/mattermark-conventions.yml
  - type: ErrorCatalog
    url: errors/mattermark-problem-types.yml
  - type: DataModel
    url: data-model/mattermark-data-model.yml
- name: Mattermark GraphQL API
  description: '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.'
  humanURL: https://developer.mattermark.com/graphql
  baseURL: https://eapi.mattermark.com/
  properties:
  - type: GraphQL
    url: graphql/mattermark.graphql
  - type: Documentation
    url: https://developer.mattermark.com/graphql
  - type: Documentation
    name: Mattermark GraphQL API docs (docs.mattermark.com)
    url: https://docs.mattermark.com/graphql_api/index.html
  - type: Authentication
    url: authentication/mattermark-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/mattermark-agentic-access.yml
- type: Website
  url: https://mattermark.com
- type: DeveloperPortal
  url: https://developer.mattermark.com/
- type: Documentation
  url: https://developer.mattermark.com/docs
- type: APIReference
  url: https://developer.mattermark.com/reference
- type: GettingStarted
  url: https://developer.mattermark.com/docs
- type: Pricing
  url: https://mattermark.com/pricing
- type: TermsOfService
  url: https://mattermark.com/terms
- type: PrivacyPolicy
  url: https://mattermark.com/privacy-policy/
- type: Blog
  url: https://mattermark.com/blog
- type: GitHubOrganization
  url: https://github.com/mattermark
- type: LLMsTxt
  url: llms/mattermark-llms.txt
- type: Authentication
  url: authentication/mattermark-authentication.yml
- type: Conventions
  url: conventions/mattermark-conventions.yml
- type: ErrorCatalog
  url: errors/mattermark-problem-types.yml
- type: RateLimits
  url: rate-limits/mattermark-rate-limits.yml
- type: Lifecycle
  url: lifecycle/mattermark-lifecycle.yml
- type: ChangeLog
  url: changelog/mattermark-changelog.yml
- type: MCPServer
  url: mcp/mattermark-mcp.yml
- type: ToolCrosswalk
  url: mcp/mattermark-tool-crosswalk.yml
- type: Packages
  url: packages/mattermark-packages.yml
- type: Conformance
  url: conformance/mattermark-conformance.yml
- type: DataModel
  url: data-model/mattermark-data-model.yml
- type: DomainSecurity
  url: security/mattermark-domain-security.yml
- type: OpenAPI
  url: openapi/mattermark-rest-api-openapi.yml
- type: GraphQL
  url: graphql/mattermark.graphql
- type: Overlay
  url: overlays/mattermark-rest-api-overlay.yaml
- type: Sandbox
  url: sandbox/mattermark-sandbox.yml
- type: Plans
  url: plans/mattermark-plans-pricing.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 13
  pass: local-v1