Machine-readable API specification for programmatic integration. The document follows the OpenAPI 3 standard and describes every public /v1 endpoint, its parameters and the authentication schemes - so you can explore the API in tools like Swagger UI or Postman and generate typed clients in any language.

Fetch the spec

The document is served without authentication so tooling can fetch it before you have a key.

curl https://api.vantafin.com/v1/openapi.json

Generate a client

Point any OpenAPI generator at the document to scaffold a typed client. For example, with openapi-generator:

# Generate a typed client in any language from the spec
npx @openapitools/openapi-generator-cli generate \
  -i https://api.vantafin.com/v1/openapi.json \
  -g typescript-fetch \
  -o ./vantafin-client

Authentication

Every endpoint accepts a Vantafin API key via the X-API-Key header, an Authorization: Bearer header, or the apiKey query parameter. The spec declares all three as security schemes so generated clients can wire them up automatically.