Millimetric

Millimetric is API-first, privacy-respecting web and product analytics for developers, indie startups ("vibe coders"), and AI agents. It captures events over a simple REST API (/v1/track, /v1/batch, /v1/identify, /v1/query, /v1/stats, /v1/sources), a ~1.8 KB browser SDK, and a zero-dependency Node SDK, with a built-in attribution classifier that splits paid versus organic social traffic (the Facebook social-vs-paid split). It stores no cookies and no raw IPs — GDPR/CCPA compliant, with a /v1/forget right-to-be-forgotten endpoint — and ships a first-class hosted Model Context Protocol (MCP) server so AI agents emit and query analytics natively. Backed by Seedcamp.

Millimetric publishes 3 APIs on the APIs.io network: Identity API, Ingest API, and Read API. Tagged areas include Company, Analytics, Web Analytics, Product Analytics, and Attribution.

Millimetric’s developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, authentication, and 27 more developer resources.

🌐 Visit website 📡 Source on GitHub
59.2/100 developing ▬ flat Agent 81/100 agent native Full breakdown ↓
scored 2026-07-23 · rubric v0.5
AccessFreemiumSelf serve⚡ Free to try
3 APIs 1 MCP Servers
CompanyAnalyticsWeb AnalyticsProduct AnalyticsAttributionPrivacyMCPAI AgentsEventsDeveloper Tools

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-23 · rubric v0.5
Composite quality — 59.2/100 · developing
Contract Quality 15.9 / 25
Developer Ergonomics 14.3 / 20
Commercial Clarity 16.8 / 20
Operational Transparency 2.1 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 81/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/millimetric: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

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

Millimetric Identity API

Link anonymous visitors to known users and honor deletion requests.

Millimetric Ingest API

Write events into a project.

Millimetric Read API

Query raw events and aggregated stats and attribution.

Arazzo Workflows 4

Multi-step API workflows described with the Arazzo specification.

_Index

ARAZZO

Stitch an anonymous visitor to a known user

Track anonymously, identify on login, tag subsequent events, then read the user's history.

ARAZZO

Capture an event and analyze traffic sources

Emit an event, then pull aggregate stats and the paid-vs-social attribution split.

ARAZZO

GDPR right-to-be-forgotten

Confirm a user's events, then permanently delete them with a secret key.

ARAZZO

MCP Servers 1

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

millimetric-mcp.yml

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Millimetric Plans

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Millimetric Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Millimetric Authentication

http · 1 scheme

SECURITY

Millimetric Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Millimetric Agentic Access

7 operations · 4 acting

7 operations · 4 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Login
Login

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 OpenAPI
OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgenticAccess
AgenticAccess
 AgentSkill
AgentSkill

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Idempotency
Idempotency
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel
 Arazzo
Arazzo
 Arazzo
Arazzo
 Arazzo
Arazzo

Scroll for all 9

Build 2

SDKs, sample code, and the tooling you integrate with

Packages
Packages
 SDKs
SDKs

Access & Security 3

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity
 Compliance
Compliance

Operate 3

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans

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)

apis.yml Raw ↑ 
aid: millimetric
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/millimetric.png
name: Millimetric
description: Millimetric is API-first, privacy-respecting web and product analytics for developers, indie startups ("vibe
  coders"), and AI agents. It captures events over a simple REST API (/v1/track, /v1/batch, /v1/identify, /v1/query, /v1/stats,
  /v1/sources), a ~1.8 KB browser SDK, and a zero-dependency Node SDK, with a built-in attribution classifier that splits
  paid versus organic social traffic (the Facebook social-vs-paid split). It stores no cookies and no raw IPs — GDPR/CCPA
  compliant, with a /v1/forget right-to-be-forgotten endpoint — and ships a first-class hosted Model Context Protocol (MCP)
  server so AI agents emit and query analytics natively. Backed by Seedcamp.
url: https://raw.githubusercontent.com/api-evangelist/millimetric/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- seedcamp
x-tier: enriched
x-tier-reason: real-api-surface
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Analytics
- Web Analytics
- Product Analytics
- Attribution
- Privacy
- MCP
- AI Agents
- Events
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 24
  pass: local-v1
apis:
- aid: millimetric:millimetric-identity-api
  name: Millimetric Identity API
  description: Link anonymous visitors to known users and honor deletion requests.
  humanURL: https://docs.millimetric.ai/api-reference/overview
  baseURL: https://api.millimetric.ai
  tags:
  - Identity
  properties:
  - type: OpenAPI
    url: openapi/millimetric-identity-api-openapi.yml
  - type: Documentation
    url: https://docs.millimetric.ai
  - type: APIReference
    url: https://docs.millimetric.ai/api-reference/overview
- aid: millimetric:millimetric-ingest-api
  name: Millimetric Ingest API
  description: Write events into a project.
  humanURL: https://docs.millimetric.ai/api-reference/overview
  baseURL: https://api.millimetric.ai
  tags:
  - Ingest
  properties:
  - type: OpenAPI
    url: openapi/millimetric-ingest-api-openapi.yml
  - type: Documentation
    url: https://docs.millimetric.ai
  - type: APIReference
    url: https://docs.millimetric.ai/api-reference/overview
- aid: millimetric:millimetric-read-api
  name: Millimetric Read API
  description: Query raw events and aggregated stats and attribution.
  humanURL: https://docs.millimetric.ai/api-reference/overview
  baseURL: https://api.millimetric.ai
  tags:
  - Read
  properties:
  - type: OpenAPI
    url: openapi/millimetric-read-api-openapi.yml
  - type: Documentation
    url: https://docs.millimetric.ai
  - type: APIReference
    url: https://docs.millimetric.ai/api-reference/overview
common:
- type: Website
  url: https://millimetric.ai
- type: DeveloperPortal
  url: https://docs.millimetric.ai
- type: Documentation
  url: https://docs.millimetric.ai
- type: APIReference
  url: https://docs.millimetric.ai/api-reference/overview
- type: GettingStarted
  url: https://docs.millimetric.ai/quickstart
- type: Support
  url: mailto:hello@millimetric.ai
- type: Pricing
  url: https://millimetric.ai/#pricing
- type: SignUp
  url: https://millimetric.ai/signup
- type: Login
  url: https://millimetric.ai/login
- type: TermsOfService
  url: https://millimetric.ai/legal/terms
- type: PrivacyPolicy
  url: https://millimetric.ai/legal/privacy
- type: StatusPage
  url: https://status.millimetric.ai
- type: OpenAPI
  url: openapi/millimetric-openapi.yml
- type: MCPServer
  url: mcp/millimetric-mcp.yml
- type: LLMsTxt
  url: llms/millimetric-llms.txt
- type: Authentication
  url: authentication/millimetric-authentication.yml
- type: AgenticAccess
  url: agentic-access/millimetric-agentic-access.yml
- type: DomainSecurity
  url: security/millimetric-domain-security.yml
- type: Conventions
  url: conventions/millimetric-conventions.yml
- type: Idempotency
  url: conventions/millimetric-conventions.yml
- type: ErrorCatalog
  url: errors/millimetric-error-codes.yml
- type: RateLimits
  url: rate-limits/millimetric-rate-limits.yml
- type: Plans
  url: plans/millimetric-plans.yml
- type: Lifecycle
  url: lifecycle/millimetric-lifecycle.yml
- type: Packages
  url: packages/millimetric-packages.yml
- type: SDKs
  url: packages/millimetric-packages.yml
- type: Conformance
  url: conformance/millimetric-conformance.yml
- type: Compliance
  url: https://millimetric.ai/legal/dpa
- type: DataModel
  url: data-model/millimetric-data-model.yml
- type: Overlay
  url: overlays/millimetric-openapi-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: Capture an event and analyze traffic sources
  url: arazzo/millimetric-capture-and-analyze.yml
- type: Arazzo
  name: Stitch an anonymous visitor to a known user
  url: arazzo/millimetric-anonymous-to-known.yml
- type: Arazzo
  name: GDPR right-to-be-forgotten
  url: arazzo/millimetric-gdpr-delete.yml