Fitbit
Fitbit is a wearable health and fitness platform — devices (trackers, smartwatches, smart scales) plus a companion mobile app and cloud data services. Founded in 2007 and acquired by Google in January 2021, Fitbit is now operated as part of Google's hardware portfolio alongside the Pixel Watch. The Fitbit Web API exposes user activity, exercise, heart rate (including intraday and HRV), sleep with stage breakdowns, body and weight, nutrition and water, devices, friends and leaderboards, and advanced sensor metrics — SpO2, breathing rate, skin and core temperature, ECG, Irregular Rhythm Notifications, and Cardio Fitness Score (VO2 Max). Authentication is OAuth 2.0 Authorization Code Grant with PKCE; default quota is 150 requests per hour per authorized user per app. A webhook subscription system streams sync notifications for the activities, body, foods, sleep, and userRevokedAccess collections. The Fitbit OS SDK lets developers ship apps and clock faces directly to Versa, Sense, and other Fitbit devices using JavaScript/CSS/SVG. The legacy Fitbit Web API is scheduled for deprecation in September 2026; new and migrated integrations should target the successor Google Health API at developers.google.com/health, which uses Google OAuth 2.0 and Google's modern infrastructure.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Fitbit the way a machine reads it — 47 machine-readable artifacts across 3 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Fitbit scores 66.8/100 (strong), with a separate agent-readiness read of 68/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
How we profile Fitbit
Each block below is one kind of artifact we hold for Fitbit. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 3
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Fitbit User API
Read and update the authorized Fitbit user's profile including display name, gender, birthday, height, weight, locale, timezone, and unit preferences (distance, weight, water, g...
Fitbit Foods API
The Foods API from Fitbit — 1 operation(s) for foods.
Fitbit Oauth2 API
The Oauth2 API from Fitbit — 4 operation(s) for oauth2.
Open Collections 12
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Fitbit Activity API
OPEN COLLECTIONFitbit Authorization API
OPEN COLLECTIONFitbit Body API
OPEN COLLECTIONFitbit Devices API
OPEN COLLECTIONFitbit ECG and Irregular Rhythm Notifications API
OPEN COLLECTIONFitbit Friends API
OPEN COLLECTIONFitbit Heart Rate API
OPEN COLLECTIONFitbit Nutrition API
OPEN COLLECTIONFitbit Sleep API
OPEN COLLECTIONFitbit Subscriptions API
OPEN COLLECTIONFitbit User API
OPEN COLLECTIONScroll within the panel for all 12 ·
GraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
Fitbit GraphQL Schema
Conceptual GraphQL schema for the Fitbit Web API — a wearable health and fitness platform acquired by Google in January 2021 and now part of Google's hardware portfolio alongsid...
GRAPHQLPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Fitbit Plans Pricing
PLANSRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Fitbit Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Fitbit Finops
FINOPSFeatures 18
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Scroll within the panel for all 18 ·
Event Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Fitbit Subscriptions Webhooks
Fitbit's Subscription API streams sync notifications to a registered Subscriber endpoint each time a user has new data available for a subscribed collection. Five collections ar...
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Fitbit Context
JSON-LDSpectral Rules 2
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Fitbit API Rules
SPECTRALFitbit API Rules
SPECTRALJSON Schema 2
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
Fitbit Activity Daily Summary
JSON SCHEMAFitbit Sleep Log
JSON SCHEMASecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Fitbit — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 5
Portal, sign-up, and the first successful call
Documentation 7
Reference material describing how the API behaves
Scroll within the panel for all 7 ·
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 2
Pagination, idempotency, versioning, errors, and events
Build 9
SDKs, sample code, and the tooling you integrate with
Scroll within the panel for all 9 ·
Access & Security 3
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 7
Status, limits, changes, and where to get help
Scroll within the panel for all 7 ·
Commercial 7
Pricing, plans, and the legal terms of use
Scroll within the panel for all 7 ·
Company 4
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/fitbit · machine-readable index on apis.io