---
name: assyro-api
description: "Search and read FDA and regulatory source records from code with the Assyro HTTP API (api.assyro.com/v1/sources), without an MCP client. Use when writing scripts or apps that query the Orange Book, openFDA, ClinicalTrials.gov, DailyMed, EUR-Lex, EMA or other public sources through Assyro."
license: Proprietary
metadata:
  author: assyro
  version: "1.0"
  docs: "https://www.assyro.com/docs"
---

# Assyro API

Search and read public regulatory and FDA source records over HTTP from Assyro's copies, with no MCP client and no key. Use this when writing code or scripts; for answering a user's question in an agent, prefer the assyro-mcp skill.

Status: preview. `https://api.assyro.com` is not serving production data yet; requests follow the published description and may change before launch.

## Endpoints

- `GET https://api.assyro.com/v1/sources`: every source with its publisher, licence and refresh schedule.
- `GET https://api.assyro.com/v1/sources/{source}/search?<arguments>`: search one source with its own query parameters. Repeat a parameter for a list (`?phase=PHASE2&phase=PHASE3`).
- `GET https://api.assyro.com/v1/sources/{source}/records/{recordId}`: one record, by the id a search returned (URL-encoded).
- `GET https://api.assyro.com/v1/openapi.json`: OpenAPI 3.1 for every source and parameter. Read it rather than guessing parameters.

## Sources

- `clinicaltrials`: ClinicalTrials.gov (U.S. National Library of Medicine (ClinicalTrials.gov)). Arguments: query, condition, conditions, intervention, interventions, sponsor, phase, status, and more.
- `openfda`: FDA databases (U.S. Food and Drug Administration). Arguments: dataset, query, productName, company, productCode, dateFrom, dateTo, dateField, and more.
- `orange-book`: FDA Orange Book (U.S. Food and Drug Administration). Arguments: query, ingredient, tradeName, applicant, applicationNumber, applicationType, teCodes, rld, and more.
- `purple-book`: FDA Purple Book (U.S. Food and Drug Administration). Arguments: query, proprietaryName, properName, applicant, blaNumber, licenseTypes, referenceProduct, centers, and more.
- `ema`: EMA (European Medicines Agency). Arguments: query, collections, dateFrom, dateTo, sort, limit, offset.
- `fda-data-dashboard`: FDA Data Dashboard (U.S. Food and Drug Administration). Arguments: dataset, query, classification, actionType, productType, product, cfrReference, country, and more.
- `eur-lex`: EUR-Lex (Publications Office of the European Union (EUR-Lex)). Arguments: query, act, limit, offset.
- `gov-uk-mhra`: MHRA (GOV.UK) (Medicines and Healthcare products Regulatory Agency (GOV.UK)). Arguments: query, collection, dateFrom, dateTo, sort, limit, offset.
- `dailymed`: DailyMed (U.S. National Library of Medicine (DailyMed)). Arguments: query, nameType, labeler, ndc, applicationNumber, boxedWarning, publishedAfter, text, and more.
- `health-canada-drugs`: Health Canada Drug Product Database (Health Canada). Arguments: query, searchBy, status, limit, offset.
- `us-code`: U.S. Code (FD&C Act, PHS Act) (Office of the Law Revision Counsel (U.S. House) via GovInfo). Arguments: query, act, limit, offset.
- `fda-standards`: FDA Recognized Consensus Standards (U.S. Food and Drug Administration). Arguments: query, designation, productCode, extent, limit, offset.
- `fda-cber-approvals`: FDA CBER Approval Documents (U.S. Food and Drug Administration). Arguments: query, product, manufacturer, documentKind, dateFrom, dateTo, limit, offset.
- `fda-psg`: FDA Product-Specific Guidances (U.S. Food and Drug Administration). Arguments: ingredient, rld, query, status, includeUnlisted, limit, offset.

Per-source parameters and examples: https://www.assyro.com/docs/sources.md and https://www.assyro.com/docs/sources/{source}.md

## Example

```bash
curl "https://api.assyro.com/v1/sources/clinicaltrials/search?intervention=tirzepatide&condition=obesity&phase=PHASE3"
```

## Rules

- Send no credentials: public reads are anonymous and limited per IP. Read the `RateLimit` headers and back off on `429`.
- An unknown parameter is refused by name with `400`; fix it from the message.
- Every record carries its `url` at the source. Records from attribution-licensed sources carry `attribution`: show it wherever you show the data.
- Send `Request-Id` from the response when reporting a problem.

More: https://www.assyro.com/docs/llms.txt