# lastseen-dev

**Canonical:** https://apis.io/providers/lastseen-dev/  
**Website:** https://lastseen.dev/  
**APIs profiled:** 1

lastseen.dev provides an independent temporal notary service for software components, offering dated, hash‑chained observations of the public record. Users can submit a repository, organization, or package manifest and receive the date when the component was last observed, along with source details and censoring status. The platform records observations in a daily SHA‑256 hash chain, publicly anchored for verifiable integrity. It supports free, unauthenticated queries under a generous rate limit, and offers additional paid capabilities with advance notice. The service emphasizes transparency, open data, and a commitment to preserving the historical state of software dependencies without predictions or scores.

## Kin Score — 33.8 / 100 (thin)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 62.5 |
| Contract Quality | 38.0 |
| Contract Governance | 22.0 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 30.2 |
| Access Clarity | 34.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 18.6 (matched via fallback).

## Agent readiness — 23.2 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | unknown |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | no |

## APIs (30)

- **lastseen-dev 45fc954bc3cc3a650498e51c089ecdef.txt API** — The 45fc954bc3cc3a650498e51c089ecdef.txt API from lastseen-dev — 1 operation(s) for 45fc954bc3cc3a650498e51c089ecdef.txt.
- **lastseen-dev About API** — The About API from lastseen-dev — 1 operation(s) for about.
- **lastseen-dev Actions API** — The Actions API from lastseen-dev — 4 operation(s) for actions.
- **lastseen-dev Badge API** — The Badge API from lastseen-dev — 3 operation(s) for badge.
- **lastseen-dev Chain API** — The Chain API from lastseen-dev — 1 operation(s) for chain.
- **lastseen-dev Check API** — The Check API from lastseen-dev — 1 operation(s) for check.
- **lastseen-dev Ci API** — The Ci API from lastseen-dev — 1 operation(s) for ci.
- **lastseen-dev Departures API** — The Departures API from lastseen-dev — 2 operation(s) for departures.
- **lastseen-dev Dispute API** — The Dispute API from lastseen-dev — 1 operation(s) for dispute.
- **lastseen-dev Dispute Log API** — The Dispute Log API from lastseen-dev — 1 operation(s) for dispute log.
- **lastseen-dev Docs API** — The Docs API from lastseen-dev — 1 operation(s) for docs.
- **lastseen-dev Entity API** — The Entity API from lastseen-dev — 14 operation(s) for entity.
- **lastseen-dev Incidents API** — The Incidents API from lastseen-dev — 4 operation(s) for incidents.
- **lastseen-dev Lastseen.dev — Free Component Mortality Checks API** — The Lastseen.dev — Free Component Mortality Checks API from lastseen-dev — 2 operation(s) for lastseen.dev — free component mortality checks.
- **lastseen-dev Lastseen2026indexnow.txt API** — The Lastseen2026indexnow.txt API from lastseen-dev — 1 operation(s) for lastseen2026indexnow.txt.
- **lastseen-dev Llms.txt API** — The Llms.txt API from lastseen-dev — 1 operation(s) for llms.txt.
- **lastseen-dev Manifest API** — The Manifest API from lastseen-dev — 1 operation(s) for manifest.
- **lastseen-dev Npm API** — The Npm API from lastseen-dev — 5 operation(s) for npm.
- **lastseen-dev Org API** — The Org API from lastseen-dev — 1 operation(s) for org.
- **lastseen-dev Privacy API** — The Privacy API from lastseen-dev — 1 operation(s) for privacy.
- **lastseen-dev Register API** — The Register API from lastseen-dev — 1 operation(s) for register.
- **lastseen-dev Reports API** — The Reports API from lastseen-dev — 5 operation(s) for reports.
- **lastseen-dev Robots.txt API** — The Robots.txt API from lastseen-dev — 1 operation(s) for robots.txt.
- **lastseen-dev Sbom API** — The Sbom API from lastseen-dev — 1 operation(s) for sbom.
- **lastseen-dev Sitemap.xml API** — The Sitemap.xml API from lastseen-dev — 1 operation(s) for sitemap.xml.
- **lastseen-dev Status API** — The Status API from lastseen-dev — 1 operation(s) for status.
- **lastseen-dev Terms API** — The Terms API from lastseen-dev — 1 operation(s) for terms.
- **lastseen-dev Verify Account API** — The Verify Account API from lastseen-dev — 1 operation(s) for verify account.
- **lastseen-dev Verify API** — The Verify API from lastseen-dev — 1 operation(s) for verify.
- **lastseen-dev W API** — The W API from lastseen-dev — 1 operation(s) for w.

## Agentic access (1)

- **Lastseen Dev Agentic Access** — 130 operations · 8 acting

## Security (1)

- **Lastseen Dev Domain Security** — TLSv1.3 · DMARC

## Tags

Company, Temporal Notary, Software Maintenance, MCP, Open Source

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