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POST
Claude Messages

Authorizations

Authorization
string
header
required

Body

application/json
model
string
required

V1 Messages Model

Example:

"claude-opus-4-8"

messages
object[]
required

V1 Messages Messages

max_tokens
integer
required

V1 Messages Max Tokens

Example:

1024

metadata
object
stop_sequences
string[]

V1 Messages Stop Sequences

stream
boolean
default:false

V1 Messages Stream

system
string

V1 Messages System

temperature
number

V1 Messages Temperature

Required range: 0 <= x <= 1
Example:

1

tool_choice
object

V1 Messages Tool Choice

tools
object[]

V1 Messages Tools

top_k
integer

V1 Messages Top K

top_p
number

V1 Messages Top P

Response

V1 Messages Response 200

id
string
required

V1 Messages Response 200 Id

type
enum<string>
required
Available options:
message
role
enum<string>
required
Available options:
assistant
content
object[]
required
model
string
required

V1 Messages Response 200 Model

stop_reason
enum<string> | null
required
Available options:
end_turn,
max_tokens,
stop_sequence,
tool_use
stop_sequence
string | null
required
usage
object
required