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API · /gnomad-api

gnomAD API

healthy 3,757 Subscribers

Population genetics as an API, powered by the Broad Institute's gnomAD (Genome Aggregation Database) — allele frequencies and gene constraint aggregated from over 800,000 human exomes and genomes. Look up a gene's constraint scores (pLI, LOEUF, observed vs expected loss-of-function, missense Z) and genomic location; get a variant's allele frequencies broken down by ancestry population (African/African-American, Admixed American, Ashkenazi Jewish, East Asian, Finnish, Non-Finnish European, South Asian, Middle Eastern…) across both genome and exome callsets, with rsIDs, homozygote counts and predicted consequence; search genes by symbol; read a transcript's constraint; and list the variants in a small genomic region. Supports GRCh38 and GRCh37 and the gnomAD v4/v3/v2 datasets. Ideal for clinical and population genetics, variant interpretation and prioritisation, rare-disease and pharmacogenomics research, and bioinformatics pipelines. Variant ids are chrom-pos-ref-alt.

#gnomad #population-genetics #allele-frequency #variants #constraint #bioinformatics #life-sciences
api.oanor.com/gnomad-api
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Machine-readable spec so AI agents can integrate this API.

/api/gnomad-api/openapi.json
/api/gnomad-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
191 ms
Server probes · 24h
Subscribers
3,757
active
Total calls
18
last 7 days
status Full status page → · 36 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 510 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 510 calls/month
  • 2 req/sec
  • Genes, variants & regions
  • No credit card
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Starter

€7.35 /month

  • 19,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 19k calls/month
  • 6 req/sec
  • Allele frequencies & constraint
  • Email support
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Pro

€21.80 /month

  • 88,500 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 88.5k calls/month
  • 15 req/sec
  • Variant interpretation
  • Priority support
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Mega

€59.80 /month

  • 342,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 342k calls/month
  • 40 req/sec
  • High-throughput population genetics
  • Dedicated SLA
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Human genomic structural variation as an API — powered by NCBI dbVar, the archive of structural variants (SVs): copy-number variants (CNVs), large deletions, duplications, insertions, inversions and translocations, typically larger than 50 base pairs. This is the structural counterpart to single-nucleotide variant databases: search structural variants overlapping a gene (or by free text) and get each variant's dbVar accession, the study it came from, its type, the genes it overlaps, its genomic placement on GRCh38 and its clinical significance; then look up any variant for the full record — placements on both GRCh37 and GRCh38 assemblies, variant type, genes, clinical significance, study type, methods and variant counts. From BRCA1 CNVs to Cri-du-chat deletions, it is ideal for genomics, cytogenetics, rare-disease and bioinformatics work. A structural-variation / CNV resource — distinct from clinical single-nucleotide variant interpretation (ClinVar), population allele frequencies (gnomAD) and trait associations (GWAS). Open data from NCBI dbVar (public domain).

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ClinVar API

ClinVar as an API, powered by the US National Library of Medicine via NCBI E-utilities. ClinVar is the public archive of the relationships between human genetic variants and health, recording the clinical significance (interpretation) of each variant — whether it is Pathogenic, Likely pathogenic, of Uncertain significance, Likely benign or Benign — together with the conditions it is associated with. /v1/search?gene=BRCA1 searches ClinVar by gene symbol, or by free text with q= (e.g. a disease or HGVS expression), returning the total number of matching variants and a list of ClinVar variation ids. /v1/variant?id=4852102 returns a variant's summary: its ClinVar accession (VCV…), title, variant type, the variation and cDNA names, the clinical classification and review status, the associated condition(s), the gene(s) and primary gene, the chromosome and location, the protein change and the molecular consequence, plus a link to the ClinVar record. Get a variation id from /v1/search, then fetch its details. Ideal for clinical-genomics and variant-annotation pipelines, rare-disease and genetic-counselling tools, and research dashboards. Data from NCBI ClinVar (public domain). This is clinical variant interpretation — distinct from population allele-frequency databases (such as gnomAD) and from protein/sequence databases. Please keep request rates modest under NCBI fair-use.

api.oanor.com/clinvar-api

Ensembl API

The Ensembl genome database as an API, powered by the official Ensembl REST service from EMBL-EBI. Look up any gene by symbol or Ensembl stable id for its biotype, genomic location, strand, description and transcripts; resolve any feature (gene, transcript, exon) by stable id; pull external database cross-references; fetch sequence variants by rsID with their alleles, most-severe consequence, minor-allele frequency, clinical significance and genomic mappings; list the genes, transcripts, exons, variations or repeats overlapping any genomic region; retrieve genomic, cDNA, CDS or protein sequences by id; and read genome-assembly metadata including the karyotype and chromosome lengths. Across human, mouse and 300+ vertebrate species. Ideal for bioinformatics pipelines, genome browsers and variant-annotation tools, genetics research apps, clinical-genomics dashboards and life-science chatbots.

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Genome Assemblies API

Reference genome assemblies as an API — powered by NCBI Assembly, the registry of genome builds for organisms across the tree of life. Search assemblies by organism (or free text) and look up any assembly's metadata: its accession (GCF_… RefSeq or GCA_… GenBank), name (e.g. GRCh38.p14), organism and taxon id, assembly level (complete genome, chromosome, scaffold or contig), contiguity statistics (contig and scaffold N50), sequencing coverage, RefSeq category, UCSC and Ensembl names, the submitting organization, release date and FTP download paths. From the human reference genome to any sequenced microbe, plant or animal, it turns the genome-assembly registry into a clean search-and-fetch API. A genome-assembly registry — distinct from sequence (ENA), genome annotation (Ensembl), variant (ClinVar, dbVar) and gene-expression (GEO) databases. Open data from NCBI Assembly (public domain).

api.oanor.com/genomes-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for gnomAD API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call gnomAD API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for gnomAD API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does gnomAD API cost?
gnomAD API has a free tier with 100 calls / month. Paid plans start at €7.35 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is gnomAD API GDPR-compliant?
All requests to gnomAD API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/gnomad-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/gnomad-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/gnomad-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/gnomad-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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