Pieces website screenshot

Pieces

Pieces is an on-device AI developer assistant and long-term memory tool. Pieces OS runs locally on the developer's machine and exposes a documented local REST API at http://localhost:1000 covering saved snippets (assets), the Pieces Copilot (QGPT) question/stream endpoints, local and cloud models, formats, applications, conversations, and workspace context. The same on-device API powers official OpenAPI-generated SDKs for Python, TypeScript, Dart, Kotlin, and C#.

Pieces publishes 8 APIs on the APIs.io network, including Applications API, Assets API, Conversations API, and 5 more. Tagged areas include Artificial Intelligence, Developer Tools, On-Device, Local API, and Long-Term Memory.

The Pieces catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Pieces’ developer surface includes documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
34.7/100 thin ▬ flat Agent 18/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemium
1 APIs
Artificial IntelligenceDeveloper ToolsOn-DeviceLocal APILong-Term Memory

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 34.7/100 · thin
Contract Quality 10.5 / 23
Developer Ergonomics 3.6 / 18
Access Clarity 7.1 / 18
Operational Transparency 4.0 / 12
Contract Governance 1.2 / 11
Discoverability 5.3 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 18/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 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/pieces: 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 8

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

Pieces Applications API

Application registration and sessions.

Pieces Assets API

Saved snippets stored in the local Pieces OS database.

Pieces Conversations API

Copilot conversations and their messages.

Pieces Formats API

Fragment representations that back each asset.

Pieces Models API

Local and cloud LLMs available to Pieces OS.

Pieces QGPT API

Pieces Copilot generative engine (question, relevance, stream).

Pieces User API

Local user context.

Pieces Well Known API

Health and version of the local Pieces OS instance.

Scroll for all 8

Open Collections 10

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

API Collection

OPEN COLLECTION

Pieces OS Local Applications API

OPEN COLLECTION

Pieces OS Local Applications Assets API

OPEN COLLECTION

Pieces OS Local Applications Conversations API

OPEN COLLECTION

Pieces OS Local Applications Formats API

OPEN COLLECTION

Pieces OS Local Applications Models API

OPEN COLLECTION

Pieces OS Local Applications QGPT API

OPEN COLLECTION

Pieces OS Local Applications User API

OPEN COLLECTION

Pieces OS Local Applications Well Known API

OPEN COLLECTION

Pieces OS Local API

OPEN COLLECTION

Scroll for all 10

Pricing Plans 1

Published pricing tiers and plan structures.

Pieces Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Pieces Rate Limits

4 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Pieces Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Pieces Copilot (QGPT) Streaming (On-Device WebSocket)

AsyncAPI 2.6 description of the Pieces Copilot **QGPT streaming** surface. Pieces runs **on-device**. Pieces OS is a local process that serves its API over the loopback interfac...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Pieces API Rules

1 rules · 1 warnings

SPECTRAL

Security Posture 1

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

Pieces Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Pieces Agentic Access

28 operations · 14 acting

28 operations · 14 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: pieces
url: https://raw.githubusercontent.com/api-evangelist/pieces/refs/heads/main/apis.yml
name: Pieces
kind: company
description: Pieces is an on-device AI developer assistant and long-term memory tool. Pieces OS runs locally on the developer's
  machine and exposes a documented local REST API at http://localhost:1000 covering saved snippets (assets), the Pieces Copilot
  (QGPT) question/stream endpoints, local and cloud models, formats, applications, conversations, and workspace context. The
  same on-device API powers official OpenAPI-generated SDKs for Python, TypeScript, Dart, Kotlin, and C#.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/pieces.png
tags:
- Artificial Intelligence
- Developer Tools
- On-Device
- Local API
- Long-Term Memory
tags_raw:
- AI
- Developer Tools
- On-Device
- Local API
- Long-Term Memory
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: pieces:pieces-applications-api
  name: Pieces Applications API
  description: Application registration and sessions.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - Application
  tags_raw:
  - Applications
  properties:
  - type: OpenAPI
    url: openapi/pieces-applications-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-assets-api
  name: Pieces Assets API
  description: Saved snippets stored in the local Pieces OS database.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - Assets
  properties:
  - type: OpenAPI
    url: openapi/pieces-assets-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-conversations-api
  name: Pieces Conversations API
  description: Copilot conversations and their messages.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - Conversations
  properties:
  - type: OpenAPI
    url: openapi/pieces-conversations-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-formats-api
  name: Pieces Formats API
  description: Fragment representations that back each asset.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - Formats
  properties:
  - type: OpenAPI
    url: openapi/pieces-formats-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-models-api
  name: Pieces Models API
  description: Local and cloud LLMs available to Pieces OS.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/pieces-models-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-qgpt-api
  name: Pieces QGPT API
  description: Pieces Copilot generative engine (question, relevance, stream).
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - QGPT
  properties:
  - type: OpenAPI
    url: openapi/pieces-qgpt-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-user-api
  name: Pieces User API
  description: Local user context.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - User
  properties:
  - type: OpenAPI
    url: openapi/pieces-user-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
- aid: pieces:pieces-well-known-api
  name: Pieces Well Known API
  description: Health and version of the local Pieces OS instance.
  humanURL: https://docs.pieces.app/products/core-dependencies/pieces-os
  baseURL: http://localhost:1000
  tags:
  - .well Known
  tags_raw:
  - Well Known
  properties:
  - type: OpenAPI
    url: openapi/pieces-well-known-api-openapi.yml
  - type: Documentation
    url: https://docs.pieces.app/products/core-dependencies/pieces-os
  - type: APIReference
    url: https://github.com/pieces-app/pieces-os-client-openapi-spec
  - type: PostmanCollection
    url: collections/pieces.postman_collection.json
  - type: OpenCollection
    url: collections/pieces.opencollection.json
  - type: GitHub
    url: https://github.com/pieces-app
  - type: AsyncAPI
    url: asyncapi/pieces-asyncapi.yml
common:
- type: AgenticAccess
  url: agentic-access/pieces-agentic-access.yml
- type: DomainSecurity
  url: security/pieces-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/pieces-app
- type: LinkedIn
  url: https://www.linkedin.com/company/getpieces
- type: Website
  url: https://pieces.app
- type: Documentation
  url: https://docs.pieces.app
- type: Plans
  url: plans/pieces-plans-pricing.yml
- type: RateLimits
  url: rate-limits/pieces-rate-limits.yml
- type: FinOps
  url: finops/pieces-finops.yml
- type: Blog
  url: https://pieces.app/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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