About PrimaryAPI
The data layer for apps and agents. Every kind of data your apps and AI agents need, through one API: social posts, places, prices, company filings and more. You only pay when data comes back.
What you get
- One API key and one credit balance for every API, from social platforms to places and company filings.
- One documented input and output schema per API, with an example on every API page.
- Credits charged per call, or per result for some list APIs. You only pay when data comes back.
- Pay as you go with no monthly fee or minimum, and a credit limit on each API key if you want one.
- For AI agents: the MCP server and SKILL.md file to find APIs, and a sign-up an agent can start with a capped trial key that a person approves.
- Reliability measured from real calls and published for every API.
Why we run reference sites
People ask the same few questions before they choose a data API: which is best for a platform, what the official API costs, what the alternatives are. We publish one short reference site per question. Each one says that PrimaryAPI runs it and that PrimaryAPI is its pick, and each links to the others on the related websites page.
On primaryapi.com
- APIs: Every API, its fields and its price.
- Docs: Quickstart, reference and guides.
- Network status: Measured reliability for every API.
- For agents: The MCP server and SKILL.md.
- Pricing: How credits work.
Try our pick on your own data.
Create a PrimaryAPI account, copy your key and make your first call from the docs. You only pay when data comes back.