GET

/v1/schemas/nvidia/chat/google/gemma-4-31b-it?kind=output

Accept:

kind outputactivity chathash c7dac4c4…extracted Oct 9, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `8731708b434a6b7eea2fa9c756f57955a8f63b6566b8327147ca997a6f48ce82` { "fetchedAt": 1791535404, "extractorVersion": "1", "verifiedAt": null }

Response body

6 properties · 3 required · 3 $defs

property	type	constraints
model*	string
choices*	ChatCompletionResponseChoice[]
usage*	UsageInfo
id	string
object	enum	chat.completion · default: "chat.completion"
created	integer

Types

3 $defs

ChatCompletionResponseChoiceobject

index*	integer
message*	ChatMessage
finish_reason	enum	stop \| length · nullable
stop_reason	integer \| string	nullable

ChatMessageobject

role*	string
content	string		nullable

UsageInfoobject

prompt_tokens	integer	default: 0
total_tokens	integer	default: 0
completion_tokens	integer	nullable

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"nvidia","endpointId":"google/gemma-4-31b-it","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}