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Helicone AI Gateway API
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Schema
Updated on 2025-12-15
Details
Filter operations
post
Create Chat Completion
post
Create Response
Create Chat Completion
post
/v1/chat/completions
Request body
object
required
metadata
union
top_logprobs
integer
nullable
temperature
union
top_p
union
user
string
safety_identifier
string
prompt_cache_key
string
cache_control
object
service_tier
union
messages
union[]
required
model
string
required
modalities
union
verbosity
union
reasoning_effort
union
max_completion_tokens
integer
nullable
frequency_penalty
number
nullable
presence_penalty
number
nullable
response_format
union
store
boolean
nullable
stream
boolean
nullable
stop
union
logit_bias
object
nullable
logprobs
boolean
nullable
max_tokens
integer
nullable
n
integer
nullable
prediction
object
nullable
seed
integer
nullable
stream_options
union
tools
union[]
tool_choice
union
parallel_tool_calls
boolean
function_call
union
functions
object[]
Response
Request accepted
Changes