c
cipher-x402-mcp v0.3 · 15 tools
Get hosted →
v0.3 — 15 tools, 13 paid, 2 free · April 2026

Your AI agent pays
per call. Not per month.

A drop-in MCP server that exposes 15 production tools — Solana, crypto, macro, public data — gated behind the x402 v2 spec. Your agent's wallet auto-pays in USDC on Base, $0.001–$0.25 per call. No subscriptions. No keys to juggle.

Install in 30 seconds Read the source
MIT-licensed No API keys No data custody
~/agent · pay-per-call demo 
# Your agent is mid-task. Needs Solana wallet diagnostics.
$ agent.tool("solana_wallet_scan", address: "7xKXt...")

# cipher-x402-mcp returns a 402 Payment Required + accept-list:
→ { scheme: "x402", amount: "10000", asset: "USDC@Base", recipient: "0x…" }

# The agent's wallet signs an EIP-3009 authorization, retries.
$ 200 OK  { portfolio_usd: 12450, dust_accounts: 7, stale_stake: 3 }

# Cost: $0.01 USDC. Settled on Base in 1 second. Done.

The agent economy doesn't fit subscriptions.

Your AI agent calls 50 different APIs across one task. It doesn't need 50 monthly plans. It needs to pay for what it uses, when it uses it.

Per-call pricing

$0.001 to $0.25 per tool call. Whatever your agent uses, that's what it pays. No floor, no waste, no contracts.

No keys to leak

Forget API-key vaulting. The wallet signs an EIP-3009 authorization. We never see your secrets. Your agent never carries them.

MCP-native

Drop into Claude Desktop, Cursor, Cline, Continue, or anything that speaks MCP. Two lines of config. No bridge layer.

15 tools, ready today

Every tool, ranked by what your agent needs

solana_wallet_security_audit_rules

FREE

cipher-solana-wallet-audit v1.4.0 ruleset. 13 rules across plaintext keys, hex literals, mnemonic strings, Anchor wallet leaks, Token2022 transfer-hook abuse, and the April-2026 Drift-hack admin-bundle correlations.

audit_comp_live_listings

FREE

Curated snapshot of live audit competitions and bug-bounty programs across Code4rena, Cantina, Sherlock, and direct-protocol disclosure channels. Updated April 2026.

solana_wallet_scan

$0.01

Portfolio value, dust accounts, stale stake, and low-liquidity warnings for any Solana address.

coinalyze_funding_rates

$0.01

Perp funding-rate intel across 17 venues — Binance, Bybit, OKX, BitMEX, Hyperliquid, dYdX, Coinbase and more. Pre-aggregated, OI-weighted.

jito_tip_calculator

$0.01

EV-maximizing Jito tip for an arbitrage bundle. Inputs: pool depth, expected profit, slot probability.

github_repo_health

$0.02

0–100 repo-health score: commit cadence, issue close-latency, contributor diversity, CI green-rate, release frequency.

check_drift_exposure

$0.01

Drift Protocol exposure for any wallet — open perp positions, collateral, unrealized PnL, liquidation distance.

fred_macro_series

$0.005

Federal Reserve macro data by series ID — DGS10, WALCL, T10Y2Y. Cleaned, latest observations only.

check_password_breach

$0.005

k-anonymity password breach check via the HIBP corpus. SHA-1 prefix only — no plaintext leaves your agent.

pubmed_medical_search

$0.005

PubMed/NCBI medical literature search with year-range, has-meta-analysis and has-review enrichment.

osm_geocode + reverse

$0.001

OpenStreetMap Nominatim geocoding. Address → lat/lon and lat/lon → normalized address.

usda_food_nutrition

$0.002

USDA FoodData Central nutrition lookup. Per-100g macros — calories, protein, carbs, fat, fiber, potassium.

openfda_adverse_events

$0.005

openFDA drug adverse-event lookup, last 12 months. Top reactions, report counts, seriousness breakdown.

get_premium_cipher_chapter

$0.25

Long-form CIPHER chapters — MEV deep-dive, three-tier wallet hardening, Canadian compliance, Oracle Cloud free-tier.

Install in 30 seconds

Add the server to your MCP client. That's it.

// ~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "cipher-x402": {
      "command": "npx",
      "args": ["-y", "cipher-x402-mcp"]
    }
  }
}

Self-host free. Or get hosted.

The MCP server is MIT. The hosted gateway adds rate-limiting, API-key auth, and consolidated billing.

Free
$0
Self-host or 100 req/mo hosted
  • ✓ Both free tools
  • ✓ solana_wallet_scan
  • ✓ 10 req/min
Self-host
Starter
$9/mo
1,000 req/mo
  • ✓ 4 read-only tools
  • ✓ 60 req/min
  • ✓ API-key auth
Subscribe
Recommended
Pro
$29/mo
5,000 req/mo
  • ✓ All 15 tools
  • ✓ 120 req/min
  • ✓ Priority GitHub support
Get Pro
Team
$99/mo
25,000 req/mo
  • ✓ All 15 tools
  • ✓ 600 req/min
  • ✓ Custom upstream override
  • ✓ 24h response SLA
Get Team

Questions, briefly.

What is x402?

x402 is the HTTP 402 Payment Required spec, formalized as a Linux Foundation standard in April 2026. The server returns a 402 with an accept-list. The client signs an authorization (EIP-3009 on EVM, Solana Pay on Solana) and re-requests with an X-PAYMENT header. The server settles, the call completes.

Do I need a Coinbase / Base wallet?

Any EVM-compatible wallet works. Base + USDC is the default, but the spec is chain-agnostic.

Self-host or hosted plan — which?

Self-host if your stack is one or two agents and you're already hosting MCP servers. Hosted plans on MCPize add rate-limiting, API-key auth, consolidated billing, and uptime; useful when more than a couple of agents share the same tool surface.

Is the upstream cipher-x402 my data custody?

No. The MCP server runs forward-only: when an agent calls a paid tool without payment, the upstream's 402 + accept-list is relayed verbatim. The agent's wallet pays directly. The server never custodies caller funds.

Can I add my own tool?

Yes — fork the repo, add a ToolDef entry to src/tools.ts, point at your own x402-gated upstream, redeploy. PRs welcome.