REST API

Free and read-only, with JSON responses and no key needed. Limit: 120 requests per minute. The base URL is https://msipep.com/api/v1/. You can browse the API in your web browser.

Endpoints

`GET /api/v1/observations/`	Search observations. Parameters: `q`, `mz` + `ppm`, `against=theoretical`, `taxon`, `accession`, `doi`, `status`, `max_ppm`, `sort`, `limit`, `offset`
`GET /api/v1/peptides/`	Peptides, filterable by `sequence`.
`GET /api/v1/peptides/{id}/`	One peptide.
`GET /api/v1/proteins/{accession}/`	One protein, including its sequence.
`GET /api/v1/publications/`	Source publications.
`POST /api/v1/annotate/`	Annotate a peak list (up to 10,000 m/z values).

Examples

curl "https://msipep.com/api/v1/observations/?mz=1198.7055&ppm=10"

curl -X POST "https://msipep.com/api/v1/annotate/" \
  -H "Content-Type: application/json" \
  -d '{"mz": [1198.7055, 1321.6747], "ppm": 10, "adducts": ["H", "Na", "K"], "taxon": 10090}'

import requests
r = requests.get("https://msipep.com/api/v1/observations/",
                 params={"q": "P02452", "status": "approved"})
for obs in r.json()["results"]:
    print(obs["peptide"]["proforma"], obs["measured_mz"], obs["ppm_error"])