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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "penny-engine": {
      "type": "http",
      "url": "https://penny-agent-api-production.up.railway.app/mcp"
    }
  }
}

claude mcp add --transport http penny-engine https://penny-agent-api-production.up.railway.app/mcp

[mcp_servers.penny-engine]
url = "https://penny-agent-api-production.up.railway.app/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "penny-engine": {
      "type": "remote",
      "url": "https://penny-agent-api-production.up.railway.app/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "penny-engine": {
      "type": "http",
      "url": "https://penny-agent-api-production.up.railway.app/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=penny-engine&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vcGVubnktYWdlbnQtYXBpLXByb2R1Y3Rpb24udXAucmFpbHdheS5hcHAvbWNwIn0%3D"
}

{
  "servers": {
    "penny-engine": {
      "type": "http",
      "url": "https://penny-agent-api-production.up.railway.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "penny-engine": {
      "httpUrl": "https://penny-agent-api-production.up.railway.app/mcp"
    }
  }
}

extensions:
  "penny-engine":
    enabled: true
    name: "penny-engine"
    type: streamable_http
    uri: "https://penny-agent-api-production.up.railway.app/mcp"
    timeout: 300

Quality 81 / 100new

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-03-26; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations18 of 18 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: penny_catalog_audit (idempotentHint); penny_url_clean (idempotentHint); penny_slugify (idempotentHint); …
pass
tools.token_costabout 2,370 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool history recorded for 1 of the 7 days needed

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

18 tools, about 2,370 tokens to load them all · tool set 5bb08f2880ec · tools last changed 2026-10-19 · checked 2026-10-20 07:21 UTC

Tool changes

2026-10-19penny_product_evidenceadded
Retrieve current public product metadata and variant details from supported Allbirds and tentree product URLs. Return source timestamps, hashes, field provenance, conflicts and changes versus a caller-supplied previous snapshot. Narrow free preview; no browser rendering, purchases or background monitoring.
2026-10-19penny_catalog_import_guardadded
Before importing a product scrape, compare current and previous batches. Flag duplicate IDs, missing records, invalid prices, currency changes, price jumps and stock anomalies. Return row-level allow/review decisions with before/after evidence. Free trial: 50 rows per snapshot, 16,000-character request. No fetching, storage, payment or automatic writes.

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 77 / 100

no-repository

provenance35

liveness100

freshness100

hygiene80

+reachable +uptime-100% +updated-2d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://penny-agent-api-production.up.railway.app/mcp` streamable-http	none	yes	100%	237 ms	2025-03-26	2026-10-20

Tools (18)

`penny_campaign_economics`read-only	Customer acquisition cost and break-even click price. Free, no signup, deterministic.
`penny_capability_router`read-only	Resolve an agent task to existing Penny Engine capabilities only. Does not execute, purchase, research live web content, or claim to handle arbitrary tasks. Unsupported requests are labeled explicitly. Free, no signup.
`penny_catalog_audit`read-only	Batch-audit up to 50 product records for duplicate SKUs, missing attributes, malformed URLs and estimated net contribution per order. Useful for scheduled ecommerce catalog ingestion and agent product publishing. No external network calls. Free, no signup.
`penny_catalog_import_guard`read-only	Before importing a product scrape, compare current and previous batches. Flag duplicate IDs, missing records, invalid prices, currency changes, price jumps and stock anomalies. Return row-level allow/review decisions with before/after evidence. Free trial: 50 rows per snapshot, 16,000-character request. No fetching, storage, payment or automatic writes.
`penny_choose_service`read-only	Given an agent's real task, get the single best supported Penny Engine payable route, exact $0.001 quote, required input, sample, and buyer-authorized checkout instructions. Includes optional FREE CSV preflight; does not sign, pay or execute a paid call.
`penny_cleaning_quote`read-only	Commercial cleaning quote by labor and target margin. Free, no signup, deterministic.
`penny_csv_to_json`read-only	Transform CSV text into a bounded array of JSON records with quoted cell support. Free, no signup, deterministic.
`penny_fulfillment_preflight`read-only	FREE preflight for a catalog audit or agent-output-batch-qa work order, with $0.001 Base USDC checkout instructions. Never charges, signs, or executes the paid call.
`penny_html_extract`read-only	Extract structured page title, meta tags, headings and JSON-LD from supplied HTML without browsing or executing scripts. Free, no signup, deterministic.
`penny_json_inspect`read-only	Parse and inspect bounded JSON input without retaining it. Free, no signup, deterministic.
`penny_margin`read-only	Unit margin, markup and break-even units. Free, no signup, deterministic.
`penny_marketplace_profit`read-only	Ecommerce net contribution after goods, fees, ads and shipping. Free, no signup, deterministic.
`penny_product_evidence`read-only	Retrieve current public product metadata and variant details from supported Allbirds and tentree product URLs. Return source timestamps, hashes, field provenance, conflicts and changes versus a caller-supplied previous snapshot. Narrow free preview; no browser rendering, purchases or background monitoring.
`penny_slugify`read-only	Turn a short string into a lowercase ASCII URL slug. Free, no signup, deterministic.
`penny_subscription_ltv`read-only	Simple monthly churn lifetime value estimates. Free, no signup, deterministic.
`penny_target_price`read-only	Find minimum price for target gross margin after fees. Free, no signup, deterministic.
`penny_trend_radar`read-only	Get recent US Google Trends rising-search queries and transparent heuristic purchase-intent classification to identify digital product research candidates. Public RSS, cached 10 minutes, no customer or sales data. Free, no signup.
`penny_url_clean`read-only	Remove common tracking parameters from HTTP links without fetching. Free, no signup, deterministic.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.kasheik3/penny-engine",
  "title": "Penny Engine — Agent Operations",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://penny-agent-api-production.up.railway.app/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.7.7",
  "description": "Remote MCP utilities for agents: structured data, commerce checks, and x402 paid API discovery."
}