GET

/v1/schemas/anthropic/chat/v1%2Fcomplete?kind=output

Accept:

kind outputactivity chathash 4771fa4d…extracted Jul 25, 2026version currentsource upstream spec ↗

Response body

5 properties · 5 required · 1 $defs

property	type	description	constraints
completion*	string	The resulting completion up to and excluding the stop sequences.
id*	string	Unique object identifier.
model*	string	The model that will complete your prompt.	17 known values
stop_reason*	string	The reason that we stopped. This may be one the following values: * `"stop_sequence"`: we reached a stop sequence — either provided by you via the `stop_sequences` parameter, or a stop sequence built into the model * `"max_tokens"`: we exceeded `max_tokens_to_sample` or the model's maximum	nullable
type*	const	Object type.	"completion" · default: "completion"

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"anthropic","endpointId":"v1/complete","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}