# NCBI BLAST URL API

**Canonical:** https://apis.io/apis/ncbi/ncbi-blast-url-api/  
**Provider:** National Center for Biotechnology Information (NCBI) — https://apis.io/providers/ncbi/  
**Base URL:** https://blast.ncbi.nlm.nih.gov/blast/Blast.cgi  
**Documentation:** https://blast.ncbi.nlm.nih.gov/doc/blast-help/developerinfo.html

NCBI BLAST URL API is one of 14 APIs that [National Center for Biotechnology Information (NCBI)](https://apis.io/providers/ncbi/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include BLAST, Sequence Alignment, Homology, and Genomics. The published artifact set on APIs.io includes API documentation and rate-limit docs.

The BLAST (Basic Local Alignment Search Tool) URL API allows developers to submit nucleotide and protein sequence homology searches via HTTPS, poll for job status, and retrieve results in multiple formats including XML, JSON, and tabular output. Jobs can be processed at NCBI or at cloud service providers. No API key is required, though responsible use guidelines apply.

## Machine-readable artifacts (3)

- **Documentation** — https://blast.ncbi.nlm.nih.gov/doc/blast-help/developerinfo.html
- **RateLimits** — https://kinlane.github.io/ncbi/rate-limits/blast.yml
- **Plans** — https://kinlane.github.io/ncbi/plans/blast.yml

## Other National Center for Biotechnology Information (NCBI) APIs (12)

- [NCBI Entrez E-utilities API](https://apis.io/apis/ncbi/ncbi-entrez-e-utilities-api/)
- [PubChem PUG REST API](https://apis.io/apis/ncbi/pubchem-pug-rest-api/)
- [PMC Open Access API (OA Service)](https://apis.io/apis/ncbi/pmc-open-access-api-oa-service/)
- [PMC ID Converter API](https://apis.io/apis/ncbi/pmc-id-converter-api/)
- [PMC OAI-PMH Service](https://apis.io/apis/ncbi/pmc-oai-pmh-service/)
- [National Center for Biotechnology Information (NCBI) BioSample API](https://apis.io/apis/ncbi/ncbi-biosample-api/)
- [National Center for Biotechnology Information (NCBI) Gene API](https://apis.io/apis/ncbi/ncbi-gene-api/)
- [National Center for Biotechnology Information (NCBI) Genome API](https://apis.io/apis/ncbi/ncbi-genome-api/)
- [National Center for Biotechnology Information (NCBI) Organelle API](https://apis.io/apis/ncbi/ncbi-organelle-api/)
- [National Center for Biotechnology Information (NCBI) Prokaryote API](https://apis.io/apis/ncbi/ncbi-prokaryote-api/)
- [National Center for Biotechnology Information (NCBI) Taxonomy API](https://apis.io/apis/ncbi/ncbi-taxonomy-api/)
- [National Center for Biotechnology Information (NCBI) Version API](https://apis.io/apis/ncbi/ncbi-version-api/)

## Tags

BLAST, Sequence Alignment, Homology, Genomics

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ncbi/ncbi-blast-url-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ncbi/.