---
description: "Discover approved tools data providers."
use_when: "The task requires structured tools data."
providers: 3
---
# Firecrawl Alexandria: Tools

Approved tools data providers for AI agents, ordered by popularity.

Search the whole catalog by describing what you need: `POST https://api.firecrawl.dev/v2/search` with `{ query: "<need>", sources: ["alexandria"] }`. The call shape is on the [router](https://alexandria.firecrawl.dev/agents).

## Providers

### DOI.org
DOI resolution through the doi.org Handle proxy: landing URL and handle values for a DOI, registration-agency lookup for batches of DOIs, content-negotiated bibliographic metadata (CSL JSON, BibTeX, citations, RDF/XML, DataCite JSON), prefix administration, the registration-agency directory and DOI system statistics.

- Provider key: `doi-org`
- Cost (Metadata): 5 credits per call
- Cost (Monthly statistics): 5 credits per call
- Cost (Prefix): 5 credits per call
- Cost (Registration agencies): 5 credits per call
- Cost (Registration agency): 5 credits per call
- Cost (Resolution statistics): 5 credits per call
- Cost (Resolve): 5 credits per call
- Next file: [Provider guide](https://alexandria.firecrawl.dev/agents/providers/doi-org)

### Qasa Swedish rentals
Swedish area resolution, rental search and listing details with SEK rent, service fees, dates and amenities.

- Provider key: `qasa`
- Cost (Areas): 5 credits per call
- Cost (Rental listing): 5 credits per call
- Cost (Rental search): 5 credits per call
- Next file: [Provider guide](https://alexandria.firecrawl.dev/agents/providers/qasa)

### Wayback Machine
Find archived website snapshots and read text from archived HTML pages.

- Provider key: `web-archive-org`
- Cost (Content): 5 credits per call
- Cost (History): 5 credits per call
- Cost (Oldest): 5 credits per call
- Next file: [Provider guide](https://alexandria.firecrawl.dev/agents/providers/web-archive-org)

Each provider guide carries its request options and response shape.