Fixture

Fixture is an AI-native CRM built for startups, backed by Y Combinator (Winter 2026 batch). Fixture aggregates every customer interaction — email, calendar, Slack and Slack Connect, meeting notes from Granola, Notion and Circleback, and Stripe billing events — into a single structured activity graph across Accounts, Contacts, Deals, Leads, Tasks and Notes, then uses agents to surface next actions and keep records current without manual data entry. The whole system is programmable — Fixture publishes a documented REST v1 API with a generated OpenAPI 3.1 description, a hosted remote MCP server with OAuth 2.1 and dynamic client registration, and a first-party agent-oriented CLI, so humans and agents work against the same surface.

Fixture publishes 11 APIs on the APIs.io network, including Accounts API, Activities API, Contacts API, and 8 more. Tagged areas include Company, CRM, Sales, B2B, and Artificial Intelligence.

Fixture’s developer surface includes documentation, API reference, getting-started guide, signup flow, authentication, CLI, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

45.4/100 developing ▬ flat Agent 42/100 agent native saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs 1 MCP Servers

Company CRM Sales B2B Artificial Intelligence Agents MCP

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 45.4/100 · developing

Contract Quality 14.0 / 23

Developer Ergonomics 10.6 / 18

Access Clarity 6.2 / 18

Operational Transparency 0.9 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 42/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/fixture: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 11

Individual APIs this provider publishes, each with its own machine-readable definition.

Fixture Accounts API

Create, read, update, and delete company records.

Fixture Activities API

List and ingest CRM Activity records.

Fixture Contacts API

Create, read, update, and delete person records.

Fixture Deals API

Create, read, update, and delete Deal records.

Fixture Fixture API API

The Fixture API API from Fixture — 1 operation(s) for fixture api.

Fixture Leads API

Create, read, update, and convert Leads.

Fixture Notes API

Create Notes linked to CRM entities.

Fixture Pipelines API

List Pipelines and inspect their nested stages.

Fixture Task Statuses API

List Task status definitions available to the current organization.

Fixture Tasks API

Create, read, update, and delete Tasks.

Fixture Users API

The Users API from Fixture — 1 operation(s) for users.

Scroll for all 11

Open Collections 12

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Fixture Accounts API

OPEN COLLECTION

Fixture Accounts Activities API

OPEN COLLECTION

Fixture Accounts Contacts API

OPEN COLLECTION

Fixture Accounts Deals API

OPEN COLLECTION

Fixture Accounts Fixture API API

OPEN COLLECTION

Fixture Accounts Leads API

OPEN COLLECTION

Fixture Accounts Notes API

OPEN COLLECTION

Fixture Accounts Pipelines API

OPEN COLLECTION

Fixture Accounts Task Statuses API

OPEN COLLECTION

Fixture Accounts Tasks API

OPEN COLLECTION

Fixture Accounts Users API

OPEN COLLECTION

Scroll for all 12

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Fixture MCP

MCP SERVER

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Fixture Authentication

http/apiKey/oauth2 · 3 schemes

SECURITY

Fixture Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Fixture Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

LLMsTxt

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

ErrorCodes

Idempotency

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

CLI

CLI

Packages

Packages

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: fixture
name: Fixture
description: Fixture is an AI-native CRM built for startups, backed by Y Combinator (Winter 2026 batch). Fixture aggregates
  every customer interaction — email, calendar, Slack and Slack Connect, meeting notes from Granola, Notion and Circleback,
  and Stripe billing events — into a single structured activity graph across Accounts, Contacts, Deals, Leads, Tasks and Notes,
  then uses agents to surface next actions and keep records current without manual data entry. The whole system is programmable
  — Fixture publishes a documented REST v1 API with a generated OpenAPI 3.1 description, a hosted remote MCP server with OAuth
  2.1 and dynamic client registration, and a first-party agent-oriented CLI, so humans and agents work against the same surface.
url: https://raw.githubusercontent.com/api-evangelist/fixture/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
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://fixture.app/logo-for-black.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: lead
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- CRM
- Sales
- B2B
- Artificial Intelligence
- Agents
- MCP
tags_raw:
- Company
- CRM
- Sales
- B2B
- Artificial Intelligence
- Agents
- MCP
- Customer Relationship Management
apis:
- aid: fixture:fixture-accounts-api
  name: Fixture Accounts API
  description: Create, read, update, and delete company records.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/fixture-accounts-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-activities-api
  name: Fixture Activities API
  description: List and ingest CRM Activity records.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Activities
  properties:
  - type: OpenAPI
    url: openapi/fixture-activities-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-contacts-api
  name: Fixture Contacts API
  description: Create, read, update, and delete person records.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/fixture-contacts-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-deals-api
  name: Fixture Deals API
  description: Create, read, update, and delete Deal records.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Deals
  properties:
  - type: OpenAPI
    url: openapi/fixture-deals-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-fixture-api-api
  name: Fixture Fixture API API
  description: The Fixture API API from Fixture — 1 operation(s) for fixture api.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Fixture API
  properties:
  - type: OpenAPI
    url: openapi/fixture-fixture-api-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-leads-api
  name: Fixture Leads API
  description: Create, read, update, and convert Leads.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Leads
  properties:
  - type: OpenAPI
    url: openapi/fixture-leads-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-notes-api
  name: Fixture Notes API
  description: Create Notes linked to CRM entities.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Notes
  properties:
  - type: OpenAPI
    url: openapi/fixture-notes-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-pipelines-api
  name: Fixture Pipelines API
  description: List Pipelines and inspect their nested stages.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Pipelines
  properties:
  - type: OpenAPI
    url: openapi/fixture-pipelines-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-task-statuses-api
  name: Fixture Task Statuses API
  description: List Task status definitions available to the current organization.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Task Statuses
  properties:
  - type: OpenAPI
    url: openapi/fixture-task-statuses-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-tasks-api
  name: Fixture Tasks API
  description: Create, read, update, and delete Tasks.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/fixture-tasks-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
- aid: fixture:fixture-users-api
  name: Fixture Users API
  description: The Users API from Fixture — 1 operation(s) for users.
  humanURL: https://fixture.app/docs/api-reference/overview
  baseURL: https://beta-api.fixture.app/api/v1
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/fixture-users-api-openapi.yml
  - type: Documentation
    url: https://fixture.app/docs
  - type: APIReference
    url: https://fixture.app/docs/api-reference/overview
  - type: GettingStarted
    url: https://fixture.app/docs/getting-started/quickstart
  - type: OpenAPI Source
    url: https://fixture.app/docs/openapi/fixture-v1.json
  - type: Authentication
    url: https://fixture.app/docs/authentication/api-keys
  - type: Scopes
    url: https://fixture.app/docs/authentication/scopes
  - type: ErrorCodes
    url: https://fixture.app/docs/api-reference/errors
  - type: RateLimits
    url: https://fixture.app/docs/api-reference/rate-limiting
common:
- type: Overlay
  url: overlays/fixture-v1-overlay.yaml
- type: DomainSecurity
  url: security/fixture-domain-security.yml
- type: Website
  url: https://fixture.app
- type: DeveloperPortal
  url: https://fixture.app/docs
- type: Documentation
  url: https://fixture.app/docs
- type: APIReference
  url: https://fixture.app/docs/api-reference/overview
- type: GettingStarted
  url: https://fixture.app/docs/getting-started/quickstart
- type: Login
  url: https://beta.fixture.app
- type: SignUp
  url: https://fixture.app/beta
- type: StatusPage
  url: https://status.fixture.app
- type: TermsOfService
  url: https://fixture.app/terms
- type: PrivacyPolicy
  url: https://fixture.app/privacy
- type: RateLimits
  url: https://fixture.app/docs/api-reference/rate-limiting
- type: ErrorCodes
  url: https://fixture.app/docs/api-reference/errors
- type: Idempotency
  url: conventions/fixture-conventions.yml
- type: Conventions
  url: conventions/fixture-conventions.yml
- type: ErrorCatalog
  url: errors/fixture-problem-types.yml
- type: Lifecycle
  url: lifecycle/fixture-lifecycle.yml
- type: Authentication
  url: authentication/fixture-authentication.yml
- type: OAuthScopes
  url: scopes/fixture-scopes.yml
- type: MCPServer
  url: mcp/fixture-mcp.yml
- type: CLI
  url: cli/fixture-cli.yml
- type: DataModel
  url: data-model/fixture-data-model.yml
- type: Conformance
  url: conformance/fixture-conformance.yml
- type: Packages
  url: packages/fixture-packages.yml
- type: WellKnown
  url: well-known/fixture-well-known.yml
- type: LLMsTxt
  url: llms/fixture-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 23
  pass: local-v1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io

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