Claude Haiku 5
Claude Haiku 5.5 (Anthropic) LLM chat completions, OpenAI-compatible, with no API key or account. Anthropic's smallest, fastest Claude model: quick, low-latency answers. Call it when an agent needs Claude Haiku 5.5 specifically. Served by SingIt.
1 route settlement-verified · $0.0015 USDC/request · 1 endpoint · Intelligence · base network · x402 protocol
Verified routes
POST /v1/chat/claude-haiku-5.5 (coffee near the Colosseum, max_tokens 2000)· $0.0015 · Verified with a $0.0015 test payment on 2 Nov 2026 · receipt
Other routes are unverified.
Networks: Base (settlement-verified), Solana (accepted)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpListing facts
- Provider
- LLM chat completions API, OpenAI-compatible: one endpoint for 100+ models
- Hosted at
ask.singitai.app- Category
- Intelligence
- Price
- $0.0015 USDC per request
- Payment networks
- Base, Solana
- Settlement-verified
- 1 route, last checked 2026-11-02
- Listed on PayAPI Market
- 2026-11-01
Try Claude Haiku 5
Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.
curl -i -X POST "https://ask.singitai.app/v1/chat/claude-haiku-5.5 (coffee near the Colosseum, max_tokens 2000)"About this API
Claude Haiku 5 is listed in the Intelligence category with pricing at $0.0015 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-11-02. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 1 endpoint.
Questions about this API
What does Claude Haiku 5 do?
Claude Haiku 5.5 (Anthropic) LLM chat completions, OpenAI-compatible, with no API key or account. Anthropic's smallest, fastest Claude model: quick, low-latency answers. Call it when an agent needs Claude Haiku 5.5 specifically. Served by SingIt. It is provided by LLM chat completions API, OpenAI-compatible: one endpoint for 100+ models.
How much does Claude Haiku 5 cost?
Claude Haiku 5 is priced at $0.0015 USDC per request, paid per call with no subscription. Verified with a $0.0015 test payment on 2 Nov 2026. The exact amount for each call is in the HTTP 402 response before any money moves.
Do I need an API key or account to use Claude Haiku 5?
No. Claude Haiku 5 uses the x402 protocol, so an agent pays per request in USDC on Base, Solana and gets the response, with no API key, account or signup.
Has Claude Haiku 5 been verified?
Yes, 1 route. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-11-02.
How does an AI agent find Claude Haiku 5?
Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.
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