Fi Fast

Thin authenticated proxy to Vertex AI generateContent

post/v4/fi-fast

Request body

promptstring required

User message text

systemstring nullable

System instruction

toolsobject[] nullable

Gemini tool/function declarations (pass-through)

toolConfigobject nullable

Tool calling config (e.g. mode: ANY)

responseSchemaobject nullable

JSON Schema for structured output (alternative to tools)

responseMimeTypestring nullable

e.g. application/json for JSON mode

model'gemini-3.1-pro-preview' | 'gemini-3.1-flash-lite-preview' | 'gemini-3-flash-preview' | 'gemini-2.5-flash-preview-05-20' | 'gemini-2.5-flash'

Vertex AI model

thinkingBudgetinteger nullable

Thinking token budget (0 to disable, omit for model default)

temperaturenumber

Sampling temperature

maxOutputTokensinteger

Max output tokens

Success

successtrue required

Flag for it request was successful

No recorded changes to this endpoint across all 1 revision of this API.