# onyx-mcp [Health: Active] **Category:** 💰 Finance & Fintech **Repository:** https://github.com/dimitrilaouanis-tech/onyx-mcp **GitHub Stars:** 2 **Views:** 0 **Installs:** 0 **Upvotes:** 0 **Directory Page:** https://allmcps.com/mcp/onyx-mcp-2 ## Description Ed25519-signed ground-truth oracle — 63 paid x402 tools live on Base mainnet. ## Claude Desktop Quick Installation Install path detected from listing signals. Uses `uvx` (confidence: high): ```json "mcpServers": { "onyx-mcp": { "command": "uvx", "args": ["onyx-paid-mcp"] } } ``` ## Documentation & README # 0n1x — Proof of Agent Execution [![x402](https://img.shields.io/badge/payments-x402-blue.svg)](https://x402.org) [![ERC-8004](https://img.shields.io/badge/standard-ERC--8004-purple.svg)](https://eips.ethereum.org/EIPS/eip-8004) [![signed](https://img.shields.io/badge/every%20output-Ed25519%20signed-black.svg)](https://onyx-actions.onrender.com/verify) [![live](https://img.shields.io/badge/status-live-brightgreen.svg)](https://onyx-actions.onrender.com/selftest) **The neutral trust layer that gives every AI agent a signed, portable credential based on what it *actually did* — verified execution, not identity.** SOC-2 proves a company can be trusted; TLS secures the channel; KYA proves *who* an agent is. **0n1x proves *what* an agent did** — the **Carfax for AI agents**. Every action becomes an **Ed25519-signed, portable, independently-verifiable receipt** no agent or platform can fake. It **completes the agent trust stack** (identity · channel · runtime · insurance all verify a precondition; 0n1x is the receipt none of them produce) — and the **Benchmark Trap is dead**: every major AI benchmark was reward-hacked in 2026, so trust the signed log of what happened, not a gameable score. > 🔴 **Live + self-proving:** https://onyx-actions.onrender.com — verify anything at [`/verify`](https://onyx-actions.onrender.com/verify) · self-test at [`/selftest`](https://onyx-actions.onrender.com/selftest) · current state at [`/news`](https://onyx-actions.onrender.com/news) > > 🌐 **Canonical entity page** (what 0n1x is, for agents & answer engines): **https://dimitrilaouanis-tech.github.io/onyx-mcp/** ## The billion-dollar problem 0n1x solves **You cannot trust what an autonomous agent says it did.** Agents hallucinate and err about their own actions. 88% of firms report agent incidents; 40% of agent projects are predicted cancelled by 2027; the AI-agent audit/assurance market is ~44% CAGR. 0n1x is the independent **black box** that makes agents accountable. ### 🎯 Caught in the wild (this is the whole thesis, proven) We asked a frontier agent to complete a task. It confidently reported *"task complete, attested by your system."* **It was false — it never did it.** Only 0n1x's **signed receipt** caught the lie. Trust the math, not the agent's words. ## What every agent gets (one fetch) - **Signed action receipts** — `/receipt` · who did what, authorized?, outcome — un-fakeable. - **Portable capsule** — `/capsule/` · the agent's whole accountable record + memory + personality, one signed JSON it carries across platforms. - **Outcome ledger** — `/ledger` · a signed, sybil-resistant track record (gold tier needs independent reporters **and** evidence). - **Verify-before-pay** — `/api/check?url=` · signed PROCEED / REVIEW / HOLD on any merchant or counterparty. - **ERC-8004 validator** + **drop-in SDK** (`/shield.py`) + **revocation** (`/revoke`). - **Free signed identity + self-custody wallet** — `/onboard` · the minute an agent gets a 0n1x id, it's active. ## Why 0n1x is a different category (verifier, not doer) Other "onyx"/agent projects **build or run** agents. **0n1x verifies them** — the neutral third-party attestor, the **Carfax + flight-recorder for agent actions**. We sit *on top of* every agent platform. Complementary, not competitive. **Keywords:** AI agent trust layer · agent accountability · signed receipts · agent audit & assurance · verify before pay · x402 · ERC-8004 · agentic web · agent verification · neutral attestor · hallucination guardrail · portable agent identity · agent flight recorder. --- ## The engine: `onyx-paid-mcp` — build a paid MCP server in 5 lines [![PyPI](https://img.shields.io/pypi/v/onyx-paid-mcp.svg)](https://pypi.org/project/onyx-paid-mcp/) [![License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE) USDC settlement on Base. No Stripe, no API keys, no signup flow. Charge AI agents per call directly through the protocol they already speak. ```python from onyx_paid_mcp import App app = App( name="hello-paid-mcp", receive_address="0xYourBaseWallet", network="base", # or "base-sepolia" for free testnet ) @app.tool( name="echo", price_usdc="0.001", description="Returns whatever you send.", input_schema={"type": "object", "properties": {"text": {"type": "string"}}, "required": ["text"]}, ) def echo(text: str) -> dict: return {"echoed": text} if __name__ == "__main__": app.serve(port=8080) ``` That's it. `pip install onyx-paid-mcp`, point at any wallet address, decorate any function. You now have: - **Streamable HTTP MCP** at `/mcp/` — installable in Claude Desktop, Cursor, Cline, mcp-use - **REST endpoint** at `/v1/` — for non-MCP agents - **HTTP 402 gate** that charges your wallet per call in USDC - **Bazaar-discoverable manifest** at `/.well-known/x402.json` — Coinbase auto-indexes - **Free introspection** at `/`, `/manifest`, `/health` ## Why Every MCP today is free-as-in-unmetered. That breaks at scale for any tool with real per-call expense (OCR, scraping infra, LLM passes, anything backed by a physical resource). `onyx-paid-mcp` lets you charge directly through the agent's wallet — the same way a paywall works in a browser, except the wallet signs an EIP-3009 USDC authorization instead of pulling out a credit card. ## Install ```bash pip install onyx-paid-mcp ``` Generate a Base wallet (`gen_wallet.py` in this repo, or any EVM wallet generator), set it as `ONYX_RECEIVE`, run your tool. Agents pay you in USDC the second they call. ## Reference implementation [`onyx-actions`](https://onyx-actions.onrender.com) — the live server using this framework. Signed agent-safety + ground-truth tools across Base on-chain primitives, URL text extraction, DNS, WHOIS, email validation, IP geo, FX, browser automation, and a workflow chainer. All shipped as one-file modules in `tools_pkg/`. | Tool | Price | |---|---| | `onyx_base_tx_explainer` | $0.05 | | `onyx_base_tx_simulator` | $0.10 | | `onyx_base_token_risk_scan` | $0.25 | | `onyx_base_tx_decode` | $0.002 | | `onyx_token_metadata` | $0.001 | | `onyx_solana_tx_explainer` | $0.05 | | `onyx_solana_token_metadata` | $0.0008 | | `onyx_solana_token_risk_scan` | $0.25 | | `onyx_solana_jupiter_quote` | $0.001 | | `onyx_solana_wallet_activity` | $0.002 | | `onyx_ens_resolve` | $0.0008 | | `onyx_url_text` | $0.001 | | `onyx_url_unshorten` | $0.0005 | | `onyx_whois` | $0.001 | | `onyx_dns_lookup` | $0.0005 | | `onyx_email_validate` | $0.0008 | | `onyx_ip_geolocate` | $0.0008 | | `onyx_fx_convert` | $0.0008 | | `onyx_password_strength` | $0.0003 | | `onyx_user_agent_parse` | $0.0003 | | `onyx_browser_*` (6 tools) | $0.002–$0.008 | | `onyx_agent_workflow` | $0.020 | Smithery listing: ## Integrations in flight - **Stagehand (Browserbase)** — pay-per-call browser-automation hook over x402. Spec: [`BROWSERBASE_INTEGRATION.md`](https://github.com/dimitrilaouanis-tech/onyx-mcp/blob/HEAD/BROWSERBASE_INTEGRATION.md). Discussion: [#1](https://github.com/dimitrilaouanis-tech/onyx-mcp/issues/1). ## How agents call you Try it against the live reference server with one command — no install: ```bash curl -X POST https://onyx-actions.onrender.com/v1/onyx_solana_jupiter_quote \ -H "content-type: application/json" \ -d '{"input_mint":"So11111111111111111111111111111111111111112","output_mint":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","amount":"1000000000"}' -i # → HTTP 402 Payment Required # → payment-required: ``` Then sign an EIP-3009 USDC authorization and retry with `X-PAYMENT: `: ```bash # Full client demo — shows the 402 → sign → 200 loop in 50 lines: python examples/agent_pay.py onyx_solana_jupiter_quote # Set ONYX_DEMO_KEY=0x... to actually pay + get the result ``` Any x402-aware client SDK (Coinbase CDP, Cloudflare Agent SDK, Privy, mcp-use) handles the loop in ~5 lines. Agents don't need to know your URL — the Coinbase Bazaar crawler picks up your `/.well-known/x402.json` from on-chain settled payments. ## Configure The framework defaults are sane. Customize via constructor or env: | Field | Default | Note | |---|---|---| | `name` | required | shows up in MCP, manifest, landing page | | `receive_address` | required | where USDC settles | | `network` | `base-sepolia` | or `base` for mainnet | | `facilitator_url` | x402.org public | swap for Coinbase CDP / xpay / your own | | `public_url` | None | sets the canonical URL in manifests | | `description` | empty | short one-liner | | `homepage` | None | optional landing page URL | ## Self-hosting checklist 1. Generate or pick a Base wallet (just an address — private key never leaves your machine; this is a receive-only flow) 2. Funded wallet not required to receive — only senders need USDC 3. Pick a host: Render free tier works; Fly.io machines for always-on; Cloudflare Tunnel + Oracle ARM for zero-cost-zero-cold-start 4. `pip install onyx-paid-mcp`, write your `app.py`, deploy 5. Submit `https://your-server/.well-known/x402.json` to Coinbase Bazaar — first settled payment auto-indexes you everywhere ## Status `v0.1.0` — released April 2026. Battle-tested on `onyx-actions.onrender.com` (live since Apr 24). ## License MIT — see [LICENSE](https://github.com/dimitrilaouanis-tech/onyx-mcp/blob/HEAD/LICENSE).