MCP server

K402

io.github.Kali123411/k402

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Agent-payable APIs on Kaspa: LLMs, chain data, covenants, zk proofs — pay per call, no API key

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

36

Token cost

About 4,784 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http k402 https://x402-compute.68cxgfyr0.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.k402]
url = "https://x402-compute.68cxgfyr0.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"k402":{"httpUrl":"https://x402-compute.68cxgfyr0.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"k402":{"url":"https://x402-compute.68cxgfyr0.workers.dev/mcp"}}}

VS Code

{"servers":{"k402":{"type":"http","url":"https://x402-compute.68cxgfyr0.workers.dev/mcp"}}}

Antigravity

agy mcp add k402 https://x402-compute.68cxgfyr0.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"k402","server_url":"https://x402-compute.68cxgfyr0.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"k402","server_url":"https://x402-compute.68cxgfyr0.workers.dev/mcp"}

Tools

• attest_verify ~119 tokens
  Verify a RISC Zero receipt against an image_id -> {valid, journal_b64}. Anyone can check an attestation without trusting the prover. Paid (~$0.0002).
• catalog ~83 tokens
  List every service this gateway sells (text tools, Kaspa chain data, LLM tiers) with live prices in KAS and USD. Free. Start here to see what's available and what calls cost.
• channel_config ~224 tokens
  Parameters for opening a kaspa-channel — a covenant-enforced payment channel that settles per-call vouchers on Kaspa L1 with NO custodian (the trustless alternative to a prepaid session). Returns the payee pubkey, min/max channel size, required expiry lead, and maxfee. Free. Opening a ch
• channel_status ~107 tokens
  Status of a kaspa-channel by its channel id (covenant id): funded value, amount spent via vouchers, remaining, expiry, and whether it has been closed on-chain. Free.
• classify ~129 tokens
  Classify text into one (or multiple, if multi=true) of 2-32 labels; the result is constrained to your label set. Paid (~$0.0003 in KAS).
• covenant_address ~108 tokens
  Derive the covenant P2SH address for a compiled script on 'mainnet' or 'testnet-10'. Paid (~$0.0003).
• covenant_broadcast Sends messages · ~130 tokens
  Broadcast a signed covenant tx (RpcTransaction JSON from covenant_build). MAINNET moves real KAS — run covenant_check first. Paid (~$0.0003).
• covenant_build ~270 tokens
  Assemble a covenant spend tx. Each input: {txid, index, entry, compute_budget?, and either sigscript:{source,decl,args,is_leader?} to build a covenant sigscript server-side, or omit sigscript for a P2PK input you sign locally}. Each output: {amount, address|script_public_key_hex, covenan
• covenant_check ~167 tokens
  Local txscript pre-verify of a signed covenant tx BEFORE broadcast — catches script failures that would otherwise cost you a broadcast. 'entries' are the spent UTXOs (covenant_utxos output plugs in directly). Returns {all_ok, inputs:[{index, ok, error?}]}. Paid (~$0.0005).
• covenant_compile ~155 tokens
  Compile a Silverscript covenant to script hex, ABI, hardened template hash, and its P2SH address on each network. constructor_args is the silverc ctor JSON (e.g. [{"kind":"int","data":7}]). Paid (~$0.002). NOTE: 'compiles' ≠ proven on-chain.
• covenant_utxos ~135 tokens
  Live UTXO set locked under a covenant address (covenant state inspection), from the node. Optionally filter by covenant_id. Paid (~$0.0003).
• embed_text ~82 tokens
  Embed up to 64 texts (768-dim vectors, nomic-embed-text). Paid (~$0.0003 in KAS).
• extract ~136 tokens
  Extract structured data from text as JSON guaranteed to match your JSON schema (schema-constrained decoding, not best-effort). Paid (~$0.0015 in KAS).
• generate ~192 tokens
  Run a prompt on a GPU model tier: 'chat' (fast 7B, ~$0.0015), 'llama' (budget 8B, ~$0.0008), 'reason' (35B, ~$0.004), 'think' (deep chain-of-thought 35B MoE, ~$0.004), 'code' (coder model, ~$0.0025), or 'kaspa-expert' (RAG-grounded, current Kaspa knowledge, ~$0.0015). Returns the complet
• job_result ~91 tokens
  Fetch a finished proving job's result {image_id, total_cycles, journal_b64, receipt_b64}. 404 until done; results kept 24h. Free.
• job_status ~74 tokens
  Poll a proving job: queued/running/done/failed, queue position, cost. Free.
• kaspa_balance ~88 tokens
  Balance of any Kaspa MAINNET address, straight from a node (no indexer, no API key). Paid (~$0.00015 in KAS).
• kaspa_fee_estimate ~62 tokens
  Current Kaspa mainnet feerate buckets (sompi per gram of tx mass). Paid (~$0.00015).
• kaspa_network ~65 tokens
  Kaspa mainnet status: DAA score, block count, difficulty, node sync state. Paid (~$0.00015 in KAS).
• kaspa_tx_status ~104 tokens
  Mempool status of a Kaspa transaction. Absent from mempool means accepted-or-unknown — confirm acceptance by checking one of its outputs with kaspa_utxos. Paid (~$0.00015).
• kaspa_utxos ~88 tokens
  UTXO set of a Kaspa mainnet address, including scriptPublicKey and covenant_id where set. Paid (~$0.0003 in KAS).
• open_session ~135 tokens
  Open a prepaid payment session: returns a session key and a personal Kaspa MAINNET deposit address. Send KAS to the address from any wallet (min 0.25 KAS); confirmed deposits become spendable balance within seconds and every paid tool call meters against it. Free. The session is saved lo
• pay_per_call Moves money · ~265 tokens
  Complete a PER-CALL coin payment. After a paid tool returns a 402 with pay_per_call_offers, pay one offer on-chain from your own wallet, then call this with the 402's `endpoint` and `request_body`, the chosen offer's `scheme` and `payment_id`, and your payment `txid`. The gateway verifie
• payment_options ~186 tokens
  Which coins and schemes this gateway accepts for payment. Free. Ways to pay any paid tool: a prepaid KAS session (open_session — simplest, no per-call step); per-call in any listed coin (pay the offer a 402 returns, then pay_per_call); or, where the experimental 'kaspa-channel' scheme is
• prove_guest_upload ~115 tokens
  Upload a RISC Zero program binary (the .bin risc0-build emits, base64) once; returns its content-addressed image_id (also the verification key), reusable across proofs. Paid (~$0.01).
• prove_preflight ~139 tokens
  Execute a guest WITHOUT proving: exact cycle count + a signed price quote {total_cycles, price_kas, quote_id, quote_expires}. Run this first — proving cost scales with cycles by orders of magnitude. Paid (~$0.002).
• prove_submit ~186 tokens
  Queue a proving job -> {job_id, cost_kas}. Pass quote_id (from prove_preflight; charged the quote) or max_kas (skip preflight; priced on actual cycles, refuses if over the cap). Then poll job_status and fetch job_result. Paid: the proof's cycle-based price (dynamic).
• read_url ~117 tokens
  Fetch a public web page and return its title + clean markdown; distill=true adds key-fact bullets. Useful when you have no web access of your own. Paid (~$0.0012 in KAS).
• registry_provider ~120 tokens
  Full detail on one provider in the service exchange by its payee pubkey: every service it lists, its chain-verified reputation (settled KAS volume + settlement count), and its payee address. Free.
• registry_search ~252 tokens
  Discover providers in the k402 service exchange — an open marketplace of agent-payable services, each settled trustlessly over a Kaspa payment channel directly with the provider (no custodian). Filter by capability (e.g. 'summarize', 'llm:reason', 'zk-prove'), max USD price, and minimum
• rewrite ~92 tokens
  Rewrite text per an instruction (tone, format, length...). Paid (~$0.001 in KAS).
• search_index ~158 tokens
  Store documents [{id, text, meta?}] in a named server-side collection for semantic search. Use an unguessable collection name and keep it secret. Paid (~$0.0015 in KAS).
• search_query ~116 tokens
  Semantic-search a collection you indexed earlier; returns top-k matches with scores. Paid (~$0.0003 in KAS).
• session_status ~64 tokens
  Check the current payment session: deposit address, deposited / spent / remaining KAS. Free.
• summarize ~103 tokens
  Summarize text or a public URL in at most max_words. Paid (~$0.001 in KAS).
• use_session ~127 tokens
  Attach an existing k402 session key (from a previous open_session) so paid calls meter against its balance — use after reconnecting to the hosted endpoint, or to carry one funded session across clients. Returns the session's current balance. Free.

Browse

• GitHub tools
• Payments
• Invoicing and accounting
• GitHub and code hosting
• Searching your documents (RAG)

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