---
title: "Resolve a DOI into normalized publication metadata, citation text, identifiers and source links. Abstracts and full paper text are excluded. $0.003 per request via x402."
method: GET
path: "/api/research/doi"
tags: ["utilities"]
---

# Resolve a DOI into normalized publication metadata, citation text, identifiers and source links. Abstracts and full paper text are excluded. $0.003 per request via x402.

`GET /api/research/doi`

## Request

- Base URL: `https://saylorinnovations.com`
- URL: `https://saylorinnovations.com/api/research/doi`
- Auth: none declared

## Query parameters

- `doi` string, required

## Headers

- `PAYMENT-SIGNATURE` string

## Response `200`

Paid normalized report.

- object
  - `service` string, required
  - `subject` string, required
  - `retrievedAt` string, date-time, required
  - `source` object, required
    - `name` string, required
    - `url` string, uri, required
  - `report` object, required
    - `doi` string, required
    - `title` string, required
    - `authors` string[], required
    - `publisher` string, nullable
    - `publication` string, nullable
    - `year` integer, nullable
    - `citation` string, required
    - `referenceCount` integer, nullable
    - `citedByCount` integer, nullable
    - `type` string, nullable
    - `url` string

## Other responses

- `400`: Invalid input; no payment settled.
- `402`: Payment required or rejected; read PAYMENT-REQUIRED.
- `404`: No provider record; no payment settled.
- `502`: Provider or settlement unavailable. Check paymentStatus before retrying.

---

[API](https://skmtc.dev/saylorinnovations/apis/saylor-innovations-agent-api.md) · [All operations](https://skmtc.dev/saylorinnovations/apis/saylor-innovations-agent-api/llms.txt) · [OpenAPI document](https://skmtc.dev/saylorinnovations/apis/saylor-innovations-agent-api/revisions/3df21c3a7629?raw)