{"slug": "three-ws-agent-payments-io-github-nirholas-agentcore-payments-mcp-0-1-4", "title": "three.ws Agent Payments (io.github.nirholas/agentcore-payments-mcp@0.1.4)", "summary": "Three.ws Agent Payments, an MCP server for governed x402 payment sessions, released version 0.1.4 to the official MCP registry on 2026-08-19, distributed as @three-ws/agentcore-payments-mcp on npm and filed under Finance & Payments. The server declares 4 environment variables and enables paying any endpoint with budget, allowlist, and per-transaction caps without requiring a key. A semantic screen by mcpindex found no manipulation pattern in its description, but the deterministic conformance probe has not yet been run.", "body_md": "[← Index](/leaderboard)\n\n# three.ws Agent Payments\n\nGoverned x402 payment sessions: pay any endpoint with budget, allowlist & per-tx caps, no key.\n\nThe current version, v0.1.4, was published to the official MCP registry on 2026-08-19. It is distributed as @three-ws/agentcore-payments-mcp on npm, filed under Finance & Payments by this index, and declares 4 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; [the index's current counts](/stats) put this record in context.\n\n## Using three.ws Agent Payments in Claude, Cursor, Gemini CLI, Cline, or Zed?\n\nMCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and **HOLDs the call** when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use **Install this server** for that).\n\nRewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less\n\n```\nuv tool install mcpindex-gate && mcpindex-config-wire\n```\n\n[method](/methodology)\n\nSemantic screen found no manipulation pattern in the description. Conformance probe not yet run.\n\n`mcpindex.integrity.description`\n\npassINFOevidence“No suspicious instructions found”via static_description\n\n- - Semantic screen only - the deterministic conformance probe has not run on this server\n- - Confidence is reported but not yet calibrated (v1)\n- - Screen reads the tool description, not the live behavior\n- - advisory\n- - registry description only no input schema\n- - screen model 8b\n- - Still current: the description we screened is unchanged, re-checked against the registry\n- - The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not\n\nSemantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.\n\nOwn this server? [Screen its description →](/screen)\n\n## That verdict was true at screening time (snapshot 2026-08-19).\n\nContracts can change after screening, with no version bump. The gate pins three.ws Agent Payments’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.\n\n[See your first HOLD in 2 minutes →](/guides/install-the-gate-first-hold)\n\nRelated: [how to trust an MCP server](/guides/how-to-trust-an-mcp-server) · [screen before install](/guides/screen-mcp-server-before-install) · [silent contract drift](/guides/mcp-silent-contract-drift)\n\nPeople vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.\n\n```\n[Independent trust record for three.ws Agent Payments](https://mcpindex.ai/server/io-github-nirholas-agentcore-payments-mcp) - screening verdict, registry provenance, and contract drift monitoring.\n<a href=\"https://mcpindex.ai/server/io-github-nirholas-agentcore-payments-mcp\">Independent trust record for three.ws Agent Payments</a> - screening verdict, registry provenance, and contract drift monitoring.\n```\n\nA live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.\n\n```\n[![mcpindex](https://mcpindex.ai/api/v1/badge/io-github-nirholas-agentcore-payments-mcp)](https://mcpindex.ai/server/io-github-nirholas-agentcore-payments-mcp)\n<a href=\"https://mcpindex.ai/server/io-github-nirholas-agentcore-payments-mcp\"><img src=\"https://mcpindex.ai/api/v1/badge/io-github-nirholas-agentcore-payments-mcp\" alt=\"mcpindex verdict\" height=\"20\" /></a>\n```\n\n`THREE_WS_SESSION`\n\nYour three.ws session token (value of the `__Host-sid` cookie from a signed-in browser). Required for account management operations: create_payment_session, list_payment_sessions, check_payment_session, cancel_payment_session.\n\n`PAYMENT_SESSION_TOKEN`\n\nA payment session bearer token (starts with 'pss_') from create_payment_session. Used by the agent for pay_with_session calls when no inline token is passed. Treat like a spending card — it authorizes payments up to the session's budget.\n\n`THREE_WS_BASE`\n\nBase URL of the three.ws API. Override only when self-hosting or targeting a preview deployment.\n\n`THREE_WS_TIMEOUT_MS`\n\nPer-request HTTP timeout in milliseconds. x402 payments involve on-chain settlement so this should be generous (default: 30000).\n\n[methodology](/methodology)\n\n[Diavgis — Greek Public Procurementgr.diavgis/procurement](/server/gr-diavgis-procurement)\n\nSearch Greek public procurement: tenders, awards, contracts, payments, buyers and suppliers.\n\n[three.ws 3D Studio (free)io.github.nirholas/threews-3d-studio-free](/server/io-github-nirholas-threews-3d-studio-free)\n\nFree text/image → 3D: generate, rig, avatar-ify, and refine GLB models. No auth, no payment.", "url": "https://wpnews.pro/news/three-ws-agent-payments-io-github-nirholas-agentcore-payments-mcp-0-1-4", "canonical_source": "https://mcpindex.ai/server/io-github-nirholas-agentcore-payments-mcp", "published_at": "2026-08-19 22:05:25+00:00", "updated_at": "2026-08-19 23:13:43.129106+00:00", "lang": "en", "topics": ["ai-tools", "ai-infrastructure"], "entities": ["three.ws Agent Payments", "MCP registry", "@three-ws/agentcore-payments-mcp", "mcpindex", "Claude", "Cursor", "Gemini CLI", "Cline"], "alternates": {"html": "https://wpnews.pro/news/three-ws-agent-payments-io-github-nirholas-agentcore-payments-mcp-0-1-4", "markdown": "https://wpnews.pro/news/three-ws-agent-payments-io-github-nirholas-agentcore-payments-mcp-0-1-4.md", "text": "https://wpnews.pro/news/three-ws-agent-payments-io-github-nirholas-agentcore-payments-mcp-0-1-4.txt", "jsonld": "https://wpnews.pro/news/three-ws-agent-payments-io-github-nirholas-agentcore-payments-mcp-0-1-4.jsonld"}}