# x402nano **Category:** 📊 Monitoring **Repository:** https://github.com/Bobjonesgood/x402nano **Views:** 0 **Installs:** 0 **Upvotes:** 0 **Directory Page:** https://allmcps.com/mcp/x402nano ## Description Machine-payable prediction-market briefs and probability-change monitoring for AI agents. ## Claude Desktop Quick Installation Heuristic fallback — verify the package name and runner against the repository README before running it. Uses `npx` (confidence: low): ```json "mcpServers": { "x402nano": { "command": "npx", "args": ["-y","x402nano"] } } ``` ## Documentation & README # x402nano ## Why x402nano x402nano is machine-payable Polymarket market intelligence for AI agents and MCP clients. It provides free market discovery and pricing tools, plus paid read-only Market Brief and Market Delta tools for `0.05 USDC` per call on Base mainnet. It does not trade, place bets, custody funds, or provide financial advice. Buyer keys remain local to the caller and are never received or stored by x402nano. **Live service:** https://x402nano.onrender.com **Public Market Watcher demo:** https://x402nano-market-watcher.bobjonesgood.chatgpt.site > x402nano is an independent project and is not affiliated with x402nano.org or the Nano/XNO cryptocurrency. “nano” refers to the project’s small, pay-per-request intelligence scope. References to x402, Base, Polymarket, USDC, and MCP describe technical compatibility or public data sources and do not imply endorsement. ## MCP Server x402nano exposes a public, stateless MCP endpoint using the production Streamable HTTP transport: ```txt https://x402nano.onrender.com/mcp ``` The remote server exposes free market discovery and pricing tools plus x402-protected 0.05 USDC Market Brief and Market Delta tools. Paid MCP calls use the official x402 MCP payment flow: the caller signs locally, the facilitator verifies and settles on Base, and x402nano never receives or stores a buyer private key. The repository also retains the proven local stdio MCP server with conservative payment budgets. See [mcp-server/README.md](mcp-server/README.md) for both connection paths, unpaid verification, and client requirements. The standards-compliant remote server manifest is [server.json](server.json). ## Agent Quickstart For a new MCP client or autonomous agent: 1. Find [`io.github.Bobjonesgood/x402nano`](https://registry.modelcontextprotocol.io/?q=io.github.Bobjonesgood%2Fx402nano) in the official MCP Registry. 2. Connect to the Streamable HTTP remote: `https://x402nano.onrender.com/mcp`. 3. List tools and confirm `list_trending_markets`, `get_market_pricing`, `get_market_brief`, and `get_market_delta`. 4. Call `list_trending_markets` to choose a market slug. 5. Call `get_market_pricing` to confirm Base mainnet pricing. 6. Use an x402-aware MCP client for `get_market_brief` or `get_market_delta`. Pricing and payment boundaries: - Free tools: `list_trending_markets`, `get_market_pricing`. - Paid tools: `get_market_brief`, `get_market_delta`. - Price: `0.05 USDC` per paid tool call, `50000` atomic units. - Network: Base mainnet, `eip155:8453`. - Seller: `0x4cc3831eB479aCFb6D44631d4a30814508Cf52d3`. - Buyer keys stay local to the caller. x402nano never receives or stores buyer private keys. - Outputs are read-only market intelligence, not trading, betting, or financial advice. ## What You Are Buying x402nano does not sell raw Polymarket data. It sells packaged, agent-ready market intelligence objects that save an agent from stitching together market metadata, current prices, movement history, scoring, receipt handling, and safety boundaries itself. A paid market brief includes: - market identity, question, category, status, end date, and source URL - current leading outcome and implied probability - outcome pricing summary and top outcomes - volume, 24h volume, 7d volume, liquidity, and change context when available - 24h movement summary from public price history when available - resolution/source context and data-quality notes - descriptive scores for movement, attention, and data completeness - watch points for future agent checks - receipt metadata proving the paid unlock - no-advice boundaries A paid market delta includes: - what changed since the caller-supplied `since` timestamp - leading outcome start/end probabilities when public history is available - absolute and relative probability change - direction, changed flag, repeat-check priority, and unusual-movement flag - current volume/liquidity context - trajectory points when available - data-quality notes explaining missing or nearest-point history - receipt metadata proving the paid unlock - no-advice boundaries Representative paid brief response: ```json { "status": "unlocked", "receipt": { "id": "receipt-id-after-payment", "amount": "0.05", "asset": "USDC", "network": "eip155:8453" }, "data": { "briefType": "read-only-market-intelligence", "market": { "slug": "example-polymarket-slug", "question": "Will example event happen in 2026?", "status": "active", "url": "https://polymarket.com/event/example" }, "snapshot": { "generatedAt": "2026-06-29T12:00:00.000Z", "source": "polymarket:gamma", "leadingOutcome": "Yes", "leadingOutcomeImpliedProbability": "42.0%" }, "metrics": { "volume24h": "17,260.91", "liquidity": "81,697.04" }, "movement": { "window": "24h", "direction": "up", "absoluteChange": "0.032" }, "scores": { "marketMovementScore": 61, "attentionScore": 72, "dataCompletenessScore": 100, "unusualMovementFlag": false }, "watchPoints": [ "Watch whether the leading outcome changes, flattens, or reverses over the next observation window." ], "boundaries": [ "Read-only public market data summary.", "No trading execution.", "No custody of user funds.", "No buy/sell/bet recommendation." ] } } ``` Representative paid delta response: ```json { "status": "unlocked", "receipt": { "id": "receipt-id-after-payment", "amount": "0.05", "asset": "USDC", "network": "eip155:8453" }, "data": { "briefType": "read-only-market-delta", "market": { "slug": "example-polymarket-slug", "question": "Will example event happen in 2026?" }, "window": { "since": "2026-06-29T11:00:00.000Z", "until": "2026-06-29T12:00:00.000Z" }, "change": { "source": "polymarket:clob", "outcome": "Yes", "startProbability": 0.388, "endProbability": 0.42, "absoluteChange": "0.032", "relativeChange": "+8.2%", "direction": "up", "changed": true }, "significance": { "repeatCheckPriority": "medium", "unusualMovementFlag": false, "summary": "The leading outcome moved up by 0.032 over the requested window." }, "dataQuality": { "priceHistoryAvailable": true, "usedNearestHistoryPoint": false, "notes": [ "Delta is computed from available public market data.", "This endpoint does not store caller state; clients provide the since timestamp." ] } } } ``` Freshness and methodology: - Paid briefs and deltas are generated on request after a valid payment. - Public freshness metadata advertises an expected max age of 90 seconds, with paid content kept behind `402` until payment. - Brief movement uses the most recent public Polymarket data and 24h leading-outcome history when available. - Delta movement is computed from public Polymarket CLOB price history for the leading outcome token between the caller's `since` timestamp and the latest available point. - If exact history is unavailable, the response says so in `dataQuality` rather than pretending precision. - Scores are descriptive heuristics from movement size, volume, liquidity, and data availability. They are not predictions or recommendations. Machine-payable market intelligence API for AI agents and bots. x402nano serves read-only Polymarket market briefs behind an HTTP 402 payment flow. An agent requests a market brief, receives a payment challenge, retries with `X-PAYMENT`, and receives unlocked JSON plus a receipt. This is market intelligence infrastructure, not trading advice. Paid briefs include 24h market movement, volume/liquidity context, resolution context, watch points, and safe descriptive scores. They do not include trading execution, custody, betting advice, or buy/sell recommendations. ## Live Endpoint ```txt https://x402nano.onrender.com ``` Free discovery/trending endpoint: ```http GET https://x402nano.onrender.com/api/markets/trending ``` Paid market brief endpoint: ```http GET https://x402nano.onrender.com/api/markets/brief?slug=will-gideon-saar-be-the-next-prime-minister-of-israel ``` Paid market delta endpoint: ```http GET https://x402nano.onrender.com/api/markets/delta?slug=will-gideon-saar-be-the-next-prime-minister-of-israel&since=2026-06-15T12:00:00Z ``` ## Historical Mainnet Proofs These are separate, owner-approved historical tests on Base mainnet. They demonstrate past paid unlocks; they are not instructions to make a payment. | Proof | Initiated by | Purchased resource | Price and network | Transaction | Current behavior | | --- | --- | --- | --- | --- | --- | | Direct core Market Brief | x402nano's dedicated local buyer script | `GET /api/markets/brief?slug=...` | `0.05 USDC` on Base mainnet (`eip155:8453`) | [BaseScan](https://basescan.org/tx/0x54ba49a288a56d20046c25f4496bec405f2eefc05fe413cd511caf96227911b1) · receipt `f1ffa2f5cabf94c3` | The core paid brief endpoint remains live; this transaction is historical. | | Direct core Market Delta | x402nano's dedicated local buyer script | `GET /api/markets/delta?slug=...&since=...` | `0.05 USDC` on Base mainnet (`eip155:8453`) | [BaseScan](https://basescan.org/tx/0x701faef1c35086f5e2ee4243a35d3a904960bd4279ffaab1890b849c1330582a) · receipt `75fe7c800fed47d4` | The core paid delta endpoint remains live; this transaction is historical. See [the proof note](DIRECT_DELTA_X402_PRODUCTION_UNLOCK_PROOF.md). | | Market Watcher companion-client proof | An owner-approved controlled Market Watcher client | One x402nano Market Brief through the companion purchase flow | `0.05 USDC` on Base mainnet (`eip155:8453`) | [BaseScan](https://basescan.org/tx/0xdcbaf5c73a55af9ed682591e747eabc915d4ef5da4f573fe44665b3710b5ef2b) | Historical companion-client proof only. The public Market Watcher deployment remains mock-first, has real payments disabled, and has no buyer key. | The direct core proof runs verified the HTTP `402` challenge, locally signed payment retry, on-chain USDC settlement, receipt generation, and read-only JSON unlock. The seller wallet was `0x4cc3831eB479aCFb6D44631d4a30814508Cf52d3`. Proof references: ```txt Direct core Market Brief transaction: https://basescan.org/tx/0x54ba49a288a56d20046c25f4496bec405f2eefc05fe413cd511caf96227911b1 In-repo proof notes: TRUST.md ARCHITECTURE.md LISTING_METADATA.md DIRECT_DELTA_X402_PRODUCTION_UNLOCK_PROOF.md ``` Note: the local buyer script exited nonzero after the real unlock because the immediate post-payment buyer balance read was stale. Seller balance updated, receipt/events were recorded, and a later no-payment balance check confirmed the buyer moved from `1.00` to `0.95` USDC. ## Buyer Flow 1. Discover the API. ```http GET https://x402nano.onrender.com/.well-known/x402.json ``` 2. Request a paid market brief. ```powershell Invoke-WebRequest ` -Uri "https://x402nano.onrender.com/api/markets/brief?slug=will-gideon-saar-be-the-next-prime-minister-of-israel" ` -UseBasicParsing ``` 3. Expect `402 Payment Required`. The response includes payment requirements similar to: ```json { "error": "payment_required", "paymentRequirements": { "network": "eip155:8453", "asset": "USDC", "amount": "0.05", "payTo": "0x4cc3831eB479aCFb6D44631d4a30814508Cf52d3", "resource": "/api/markets/brief?slug=will-gideon-saar-be-the-next-prime-minister-of-israel" } } ``` 4. Sign and send the x402 payment. Use an x402-compatible client to sign the Base mainnet USDC payment, then retry the same request with: ```http X-PAYMENT: ``` 5. Receive the unlocked JSON. Successful paid responses include a receipt and the market brief payload: ```json { "receipt": { "id": "f1ffa2f5cabf94c3", "network": "eip155:8453", "amount": "0.05", "asset": "USDC" }, "data": { "briefType": "read-only-market-intelligence", "status": "ok", "market": { "slug": "will-gideon-saar-be-the-next-prime-minister-of-israel" }, "movement": { "window": "24h", "direction": "flat", "trajectory": [] }, "metrics": { "volume24h": "17,260.91", "liquidity": "81,697.04" }, "resolution": { "endDate": "2026-12-31T00:00:00Z" }, "scores": { "marketMovementScore": 45, "attentionScore": 70, "dataCompletenessScore": 100, "unusualMovementFlag": false } } } ``` ## Delta Briefs Delta briefs are the repeat-use paid object for agent polling loops. A brief answers "what is this market right now?" A delta answers "what changed since the agent last checked?" ```http GET https://x402nano.onrender.com/api/markets/delta?slug=will-gideon-saar-be-the-next-prime-minister-of-israel&since=2026-06-15T12:00:00Z ``` Without payment, the route returns `402 Payment Required`. With a valid `X-PAYMENT` retry, the response includes a receipt and read-only delta JSON: ```json { "status": "unlocked", "receipt": { "id": "receipt-id-after-payment", "network": "eip155:8453", "amount": "0.05", "asset": "USDC" }, "data": { "briefType": "read-only-market-delta", "market": { "slug": "will-gideon-saar-be-the-next-prime-minister-of-israel" }, "window": { "since": "2026-06-15T12:00:00.000Z", "until": "2026-06-15T18:30:00.000Z" }, "change": { "available": true, "outcome": "Yes", "absoluteChange": "0.050", "relativeChange": "+11.9%", "direction": "up", "changed": true }, "significance": { "repeatCheckPriority": "high", "unusualMovementFlag": true, "summary": "The leading outcome moved up by 0.050 over the requested window." } } } ``` Delta briefs are descriptive market context for agents. They do not include trading execution, custody, betting advice, predictions, or buy/sell recommendations. Example polling clients: ```txt examples/delta-polling.js examples/delta-polling.py ``` Both examples show the intended agent loop: inspect freshness metadata, request a delta, handle the `402`, retry with an x402 payment from a caller-provided signing hook, parse the receipt and delta payload, then update `since` after a successful response. ## Local Proof Command Run these commands from the repository root after a normal clone. Preflight only; this does not sign or send a payment: ```powershell $env:MAINNET_PAID_PATH="/api/markets/brief?slug=will-gideon-saar-be-the-next-prime-minister-of-israel" $env:MAINNET_MAX_USDC="0.05" $env:MAINNET_PAYMENT_ACK="PREFLIGHT_ONLY" npm.cmd run agent:mainnet ``` Real payment example, only for a separately owner-approved test that intentionally sends one `0.05 USDC` unlock: ```powershell $env:MAINNET_PAID_PATH="/api/markets/brief?slug=will-gideon-saar-be-the-next-prime-minister-of-israel" $env:MAINNET_MAX_USDC="0.05" $env:MAINNET_PAYMENT_ACK="PAY_REAL_0.05_USDC" npm.cmd run agent:mainnet ``` ## Launch Ask x402nano is looking for feedback from 20 AI agent, trading bot, and market-data builders. What to check: ```txt Would a machine-readable market brief be useful to your agent? Is 0.05 USDC per brief the right shape for testing? What fields would your bot need before paying for a brief? Would you rather call this directly, through an SDK, or through another agent framework? ``` Positioning: ```txt Stop scraping. Use a machine-payable API for market briefs. 0.05 USDC per read-only market brief on Base. No account. No API key. HTTP 402 and X-PAYMENT. ``` ## Current Scope In scope: ```txt Polymarket public data read-only market intelligence free trending endpoint paid market brief endpoint paid market delta endpoint HTTP 402 challenge Base mainnet USDC unlock receipt and proof ``` Out of scope for this launch: ```txt trading advice trade execution Telegram bot lead generation x402 consulting new product features before feedback ``` ## Development ```powershell npm.cmd install npm.cmd run build ``` Core scripts: ```txt npm.cmd run agent:mainnet npm.cmd run wallet:mainnet:create npm.cmd run build ``` ## License This project is licensed under the [MIT License](LICENSE).