AltAPIs

API archive entry · source-reported

OpenUnfurl

No-signup link unfurl API returning Open Graph, Twitter Card and oEmbed metadata

Provider / source website

From the publisher

README & documentation

Source preview

Read the project’s overview, installation instructions and usage examples. The original README is the source of truth.

A zero-signup link-unfurl / link-preview API. No account, no API key — one GET request. Give it any public URL, get back clean preview metadata (title, description, image, siteName, favicon, Open Graph / Twitter Card, oembed) as JSON. Built so autonomous AI agents can use it as a tool — an agent has no human to do a signup. Live: https://openunfurl.vercel.app Sample response: Any missing field is null. Errors return JSON with an error key and an appropriate HTTP status (400 bad/blocked/missing URL, 422 fetch failed, 429 rate limited, 405 wrong method). OpenUnfurl is also a remote MCP server, so an agent can call it as a tool with no signup, no API key, no OAuth. application/json response — no sessions, no SSE) returns the same preview JSON as the REST endpoint (also as structuredContent) Drop this into any MCP client config (Claude Desktop, Cursor, or any client that speaks…

SolvoHQ/openunfurl on GitHub A short preview, not the full document.

Read the full README ↗ · Preview checked 2026-11-03T16:14:50.043Z

Inside the original README — Document outline
  1. OpenUnfurl
  2. Quick start
  3. JavaScript
  4. Use as an MCP tool (AI agents / Claude / Cursor / LLM clients)
  5. Why
  6. Limitations
  7. Self-host — it's zero-dependency files
  8. License

Headings are captured from the source. Links open the publisher’s document, not a locally hosted copy.

Links from the README

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Documentation belongs to its respective authors. A listing is not a grant of reuse or training rights. Confirm the document’s own terms at the source.

Access at a glance

These are reported access facts. Check the current documentation before integrating.

  • Authentication: No auth.
  • HTTPS: reported by the source.
  • Browser access (CORS): Yes.

Pricing and limits

Current plans, quotas, and rate limits have not been reviewed for this listing. Check the provider’s current terms; no authentication does not necessarily mean free usage.

Documentation and sources

Imported from Public API Lists. A detailed editorial review has not been published yet.

Provider / source reference

Public API Lists · MIT · Copyright (c) 2020 Public API Lists

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Source reference

Public API Lists

This page separates source-reported facts from questions that need live provider verification.