# Matter

**Canonical:** https://apis.io/providers/matter/  
**Website:** https://www.getmatter.com  
**APIs profiled:** 6

Matter is a modern read-later application for people who take reading seriously — save articles, newsletters, podcasts, PDFs, and tweets from anywhere and read them in a clean, focused interface on iOS and the web, with highlighting, notes, tags, offline search, text-to-speech, and audio transcription of podcasts and videos. For Matter Pro subscribers, Matter ships a public REST API (api.getmatter.com/public/v1) to save, organize, search, and incrementally sync a reading library, secured with a personal Bearer token. It is complemented by a first-party CLI/TUI and official Obsidian, Roam, and Logseq highlight-export integrations. Matter is backed by GV (Google Ventures).

## Kin Score — 52.9 / 100 (developing)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 52.9).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 64.5 |
| Governance | 11.5 |
| Operational Transparency | 55.3 |
| Developer Ergonomics | 60.3 |
| Commercial Clarity | 34.2 |

## Agent readiness — 50.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | derived |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | verified |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (6)

- **Matter Account API** — Your user profile and API quota.
- **Matter Annotations API** — Highlights and notes on items.
- **Matter Items API** — Articles, podcasts, videos, PDFs, and tweets in your library.
- **Matter Reading Sessions API** — Reading time history.
- **Matter Search API** — Full-text search across Matter.
- **Matter Tags API** — Labels for organizing items.

## MCP servers (1)

- **matter-mcp.yml**

## Agentic access (1)

- **Matter Agentic Access** — 17 operations · 9 acting

## Security (3)

- **Matter Authentication** — http · 1 scheme
- **Matter Domain Security** — TLSv1.3 · HSTS · DMARC
- **Matter Vulnerability Disclosure** — security.txt · contact published

## Tags

Company, Consumer, Reading, Read Later, Productivity, Content, Highlights, Bookmarking

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/matter/). Scores are computed from the provider's own public artifacts under a published rubric.