Plain

aid: plain
name: Plain
description: Plain is a customer support platform for B2B and technical SaaS companies, built entirely on its own public GraphQL
  API so there is full parity between what the product UI and the API can do. It unifies support across email, chat, Slack,
  and API-created threads, with customers, companies, tenants, tiers and SLAs, labels, help center articles, snippets, tasks,
  and events as first-class entities. Developers integrate via a Relay-style GraphQL API (bearer API keys with fine-grained
  permissions), typed TypeScript and Go SDKs, a CLI, customer-card UI components, HMAC-signed webhooks, a hosted MCP server,
  and an official agent skill. This profile was enriched from Plain's public developer surface.
url: https://raw.githubusercontent.com/api-evangelist/plain/refs/heads/main/apis.yml
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://framerusercontent.com/assets/8LkFDsA5X0pauVd2p3tTSJ4AF4s.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Customer Support
- Customer Service
- Help Desk
- Support
- SaaS
- GraphQL
- Webhooks
- MCP
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Plain Core GraphQL API
  description: Plain's Core GraphQL API — the same API the Plain product is built on. Manage customers, companies, tenants,
    threads, messaging, help center, labels, tiers/SLAs, snippets, tasks, events, and webhook targets.
  humanURL: https://www.plain.com/docs/api-reference
  baseURL: https://core-api.uk.plain.com/graphql/v1
  properties:
  - type: GraphQL
    url: graphql/plain-schema.graphql
  - type: Documentation
    url: https://www.plain.com/docs
  - type: APIReference
    url: https://www.plain.com/docs/api-reference
  - type: Authentication
    url: authentication/plain-authentication.yml
common:
- type: DomainSecurity
  url: security/plain-domain-security.yml
- type: DeveloperPortal
  url: https://www.plain.com/docs
- type: Documentation
  url: https://www.plain.com/docs
- type: APIReference
  url: https://www.plain.com/docs/api-reference
- type: GettingStarted
  url: https://www.plain.com/docs/graphql/introduction
- type: GitHubOrganization
  url: https://github.com/team-plain
- type: Blog
  url: https://www.plain.com/blog
- type: Support
  url: https://help.plain.com
- type: Pricing
  url: https://www.plain.com/pricing
- type: Login
  url: https://app.plain.com
- type: TermsOfService
  url: https://www.plain.com/legal/terms-and-conditions
- type: PrivacyPolicy
  url: https://www.plain.com/legal/privacy-policy
- type: StatusPage
  url: https://status.plain.com
- type: ChangeLog
  url: https://www.plain.com/changelog
- type: ChangeLog
  url: changelog/plain-changelog.yml
- type: GraphQL
  url: graphql/plain-schema.graphql
- type: Authentication
  url: authentication/plain-authentication.yml
- type: Conventions
  url: conventions/plain-conventions.yml
- type: ErrorCatalog
  url: errors/plain-error-codes.yml
- type: Lifecycle
  url: lifecycle/plain-lifecycle.yml
- type: Conformance
  url: conformance/plain-conformance.yml
- type: DataModel
  url: data-model/plain-data-model.yml
- type: Packages
  url: packages/plain-packages.yml
- type: SDKs
  url: packages/plain-packages.yml
- type: CLI
  url: cli/plain-cli.yml
- type: Components
  url: components/plain-components.yml
- type: MCPServer
  url: mcp/plain-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/plain-webhooks.yml
- type: LLMsTxt
  url: llms/plain-llms.txt
- type: TrustCenter
  url: security/plain-trust-center.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 18
  pass: local-v1