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Messages (v1/messages)
Pass-through endpoint for Anthropic Messages API requests.
Endpoint
http
1POST /v1/messages2Content-Type: application/jsonRequest example
bash
1curl "https://api.0-0.pro/v1/messages?beta=true" \2 -H "x-api-key: $API_KEY" \3 -H "Content-Type: application/json" \4 -H "anthropic-version: 2023-06-01" \5 -d '{6 "model": "claude-sonnet-4-6",7 "max_tokens": 128,8 "messages": [{"role":"user","content":"Hello"}]9 }'Pass-through behavior
0-0 forwards the request body, compatible headers, and query string upstream, then returns the upstream response body unchanged. The gateway still authenticates your 0-0 key and records usage.
Usage accounting
input_tokensare billed at the model input price, whilecache_read_input_tokensare recorded as cached tokens and billed at input × 0.1.cache_creation.ephemeral_5m_input_tokensare billed at input × 1.25;cache_creation.ephemeral_1h_input_tokensare billed at input × 2.- If Anthropic only returns aggregate
cache_creation_input_tokens, 0-0 defaults the cache write to the 5m rate. All Claude cache-derived prices inherit the configured model discount.