Adzuna API vs USAJOBS API for AI agents
Adzuna API is a REST API from the Adzuna job search engine for searching its job ads plus salary and labour-market data. USAJOBS API is the official REST API for searching public U.S. federal government job announcements on USAJOBS.
The short answer
- Adzuna API: Building a job board or labour-market tool with an aggregated, multi-country job feed plus salary data.
- USAJOBS API: Authoritative, reusable data on U.S. federal government job openings.
Side by side
| Adzuna API | USAJOBS API | |
|---|---|---|
| Searches | Adzuna's aggregated job ads, queried per country via a two-letter code in the URL (docs examples use gb). | Public job announcements posted on USAJOBS (status/internal jobs need extra steps); a single employer-side source, not an aggregator. |
| Returns | JSON results with id, title, a description snippet, company.display_name, location, category, salary_min/salary_max, salary_is_predicted, contract_type, created, latitude/longitude and redirect_url. | JSON SearchResult items with PositionTitle, PositionURI, ApplyURI, OrganizationName, PositionLocation (with lat/long) and PositionRemuneration. |
| Before the first call | Register for an app_id and app_key, sent as query parameters on every call. | An API key requested through an application form (name, email, phone, organization, intended use); calls send Host, User-Agent (your email) and Authorization-Key headers. |
| Free | Default limits of 25 hits per minute, 250 per day, 1,000 per week and 2,500 per month; commercial use is permitted subject to a 14-day trial. | Not stated on its pages |
| Acting on a result | redirect_url; the documented examples point to adzuna.co.uk/jobs/land/ad/... (through Adzuna), not straight to the employer. | PositionURI/ApplyURI point to the announcement on usajobs.gov. |
| Limits on keeping or showing results | Each displayed ad must carry an 'Adzuna' label at least 116x23 px, linked to Adzuna; on termination all Adzuna data must be removed; after the trial a licence agreement may be required. | Public Data may be copied, stored, republished and used commercially; attribution to USAJOBS is encouraged, not required; don't present modified data as official. Max 10,000 rows per query, 500 per page. |
| Coverage | Not stated on its pages | United States federal government jobs (in the U.S. and abroad). |
| MCP server | No official server listed | No official server listed |
Where Openpath fits
If the agent needs a job to apply for in Austin, Texas, or a remote one, Openpath returns the listings themselves, free and with no key. See Openpath vs Adzuna API and Openpath vs USAJOBS API.
Questions people ask
What do I need before I can use Adzuna API?
Register for an app_id and app_key, sent as query parameters on every call.
Is Adzuna API free?
Default limits of 25 hits per minute, 250 per day, 1,000 per week and 2,500 per month; commercial use is permitted subject to a 14-day trial.
What do I need before I can use USAJOBS API?
An API key requested through an application form (name, email, phone, organization, intended use); calls send Host, User-Agent (your email) and Authorization-Key headers.
Is USAJOBS API free?
Its pages listed no free use when we read them on October 15, 2026.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
Adzuna API, read on October 15, 2026:
- developer.adzuna.com/overview: “two obligatory parameters”
- developer.adzuna.com/docs/terms_of_service: “250 hits per day”
- developer.adzuna.com/docs/terms_of_service: “permitted subject to a 14 day trial period”
- developer.adzuna.com/docs/terms_of_service: “a licence agreement may be required”
- developer.adzuna.com/docs/terms_of_service: “label each displayed advert with the phrase "Adzuna" at least 116 X 23 pixels in size”
- developer.adzuna.com/docs/search: “we currently only provide a snipped of the job description”
- developer.adzuna.com/docs/search: “http://adzuna.co.uk/jobs/land/ad/129698749”
USAJOBS API, read on October 15, 2026:
- developer.usajobs.gov/guides/authentication: “To request an API Key, please go the the API Request page and fill out an application.”
- developer.usajobs.gov/apirequest: “Only public job information is available through this site.”
- developer.usajobs.gov/guides/rate-limiting: “Maximum of 10,000 rows per query”
- developer.usajobs.gov/guides/terms-of-service: “Public Data may be copied, stored, reformatted, adapted, analyzed, published, redistributed, and used for lawful commercial”
- developer.usajobs.gov/guides/terms-of-service: “OPM encourages users to identify USAJOBS as the source, link to the current official job announcement”
- developer.usajobs.gov/api-reference/get-api-search: “URI to apply for the job offering.”
- usajobs.gov/HiringPath/Public: “the official employment site for the federal government”