# Delphi Epidata API

**Canonical:** https://apis.io/apis/carnegie-mellon-university/delphi-epidata/  
**Provider:** Carnegie Mellon University — https://apis.io/providers/carnegie-mellon-university/  
**Base URL:** https://api.delphi.cmu.edu/epidata  
**Documentation:** https://cmu-delphi.github.io/delphi-epidata/

Delphi Epidata API is one of 7 APIs that [Carnegie Mellon University](https://apis.io/providers/carnegie-mellon-university/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 1 JSON Schema definition. Tagged areas include Epidemiology, Public Health, Health Data, Research, and Open Data. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and 1 JSON Schema.

Public, anonymously accessible HTTP/JSON API operated by the Delphi research group at Carnegie Mellon University, serving real-time and historical epidemiological surveillance data — COVIDcast indicator signals, CDC FluView influenza-like-illness records, and Delphi's own nowcasts and forecasts. Revision-aware: every record carries the issue and lag that describe when it was reported versus when it was observed. Verified live on five endpoints 2026-08-19; /epidata/version returned 4.1.44. Errors are returned with HTTP 200 and signalled only in the body's `result` field.

## Machine-readable artifacts (6)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/carnegie-mellon-university/refs/heads/main/openapi/carnegie-mellon-university-delphi-epidata-openapi.yml
- **Documentation** — https://cmu-delphi.github.io/delphi-epidata/
- **APIReference** — https://cmu-delphi.github.io/delphi-epidata/api/README.html
- **SourceCode** — https://github.com/cmu-delphi/delphi-epidata
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/carnegie-mellon-university/refs/heads/main/json-schema/carnegie-mellon-university-delphi-epidata-envelope.json
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/carnegie-mellon-university/refs/heads/main/apis.yml

## Other Carnegie Mellon University APIs (6)

- [CERT/CC Vulnerability Notes API](https://apis.io/apis/carnegie-mellon-university/cert-vulnerability-notes/)
- [CMU Library Publishing Service API + OAI-PMH](https://apis.io/apis/carnegie-mellon-university/library-publishing/)
- [CMU Web Login (Shibboleth SAML 2.0 Identity Provider)](https://apis.io/apis/carnegie-mellon-university/web-login-sso/)
- [KiltHub Institutional Repository (figshare) — tenant](https://apis.io/apis/carnegie-mellon-university/kilthub-figshare-tenant/)
- [Canvas LTI 1.3 Advantage (Instructure) — tenant](https://apis.io/apis/carnegie-mellon-university/canvas-lti-tenant/)
- [CMU Eats API (ScottyLabs) — student-operated](https://apis.io/apis/carnegie-mellon-university/cmu-eats-scottylabs/)

## Tags

Epidemiology, Public Health, Health Data, Research, Open Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/carnegie-mellon-university/delphi-epidata/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/carnegie-mellon-university/.