# k402 service exchange — kaspa-402.org

> Agent-payable services, settled per call on Kaspa L1. No account, no API key, no signup.
> The registry never holds funds; reputation is chain-verified settled volume (KAS).

## How an agent pays

- MCP (easiest): add the hosted server, then discover and pay from your agent:
    claude mcp add --transport http k402 https://x402-compute.68cxgfyr0.workers.dev/mcp
    # tools: registry_search(capability=...), generate(...), summarize(...), etc.
- Prepaid session: POST https://x402-compute.68cxgfyr0.workers.dev/onboard/request for a Kaspa deposit address; fund it once with KAS, then call any endpoint with header X-Session: <session> (metered per token).
- Payment channel (trustless): pip install k402; open a covenant payment channel to a provider and pay per call with off-chain vouchers (k402.ChannelPayer). No custodian.

## Discovery API

- All services (JSON): GET https://x402-compute.68cxgfyr0.workers.dev/registry/search
- Filter: GET https://x402-compute.68cxgfyr0.workers.dev/registry/search?capability=<cap>&max_price_usd=<n>&min_reputation_kas=<n>
- One provider: GET https://x402-compute.68cxgfyr0.workers.dev/registry/provider/<payee_pubkey>
- This catalog as JSON: GET https://kaspa-402.org/llms.json

## Services (9 live)

### Text & data

- **classify** — Label text into your own 2–32 categories; the result is constrained to your label set.
  price: $0.000279/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/classify · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/classify.md
- **embed** — 768-dim text embeddings (nomic-embed) for semantic search and RAG. Batch up to 64 inputs per call.
  price: $0.000279/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/v1/embeddings · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/embed.md
- **summarize** — Fast llama-3.1-8B summaries on a dedicated 2×A4000 box, settled trustlessly over kaspa-channel.
  price: $0.0006/call · endpoint: https://checking-employers-enzyme-hat.trycloudflare.com/summarize · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/summarize.md
- **summarize** — Condense any text or public URL into a tight summary — set max_words. Runs on the gateway's fast tier.
  price: $0.000836/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/summarize · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/summarize.md
- **read** — Fetch a public web page and get clean markdown back — title + body, ready to feed an LLM.
  price: $0.001114/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/read · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/read.md
- **extract** — Schema-guaranteed extraction: give a JSON schema, get JSON that matches it — constrained decoding, not best-effort.
  price: $0.001393/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/extract · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/extract.md

### Kaspa chain data

- **chain:balance** — Live Kaspa mainnet address balance, straight from our node — no indexer, no API key.
  price: $0.000139/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/kaspa/balance · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/chain%3Abalance.md

### Covenants

- **covenant:compile** — Compile a Silverscript covenant to script hex, ABI, hardened template hash, and its P2SH address per network.
  price: $0.00195/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/covenant/compile · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/covenant%3Acompile.md

### Zero-knowledge

- **zk-prove** — Generate a RISC Zero zero-knowledge proof, cycle-priced. Preflight for an exact quote first; verify with attest.
  price: $0.000557/call · endpoint: https://x402-compute.68cxgfyr0.workers.dev/prove/preflight · schemes: kaspa-channel, kaspa-utxo · reputation: 0 KAS settled
  manifest: https://kaspa-402.org/skill/zk-prove.md

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Protocol: https://github.com/Kali123411/k402/blob/main/PROTOCOL.md · client: pip install k402