Koskamo

Harvey Verify MCP

An MCP server for AI agents that performs post-transaction outcome verification using code-checked verification and an advisory AI judge. It allows agents to verify if services delivered promised results, retrieve aggregated quality scores, and report outcomes, with micropayments handled via USDC on Solana.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Harvey Verify MCP logo, by MeltingPixelsCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by MeltingPixels
You need:No account needed
MCP endpoint (Streamable HTTP)
https://verify.rugslayer.com/mcp
Vendor documentation

What its tools do

5 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Not annotated (5)

5 of 5 have a description · 0 of 5 declare behavior hints · 3 of 3 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Verify if a service delivered what was promised
  • Check server status and payment configuration
  • Retrieve aggregated quality scores for a service
  • Report simple pass/fail outcomes

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.meltingpixelsai/zero-core-verify@1.0.0Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
harvey-verify 1.0.0
MCP protocol negotiated in check
2025-06-18
Tools
5 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Tools

5 advertised

list_tools
Advertised by the server during the last successful anonymous check.

List all available Harvey Verify tools with pricing and input requirements. Use this for discovery.

list_tools input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {},
  "additionalProperties": false
}
health
Advertised by the server during the last successful anonymous check.

Check Harvey Verify server status, uptime, and payment network configuration.

health input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {},
  "additionalProperties": false
}
verify_outcome
Advertised by the server during the last successful anonymous check.

Post-transaction verification. Code checks what it can: the response against expected_schema (a JSON Schema or a list of required field names), and a measured response time against a stated limit. A response that fails code's checks fails without the AI judge; otherwise the judge scores accuracy and completeness as advice. Without a schema or a time limit only the judge decides, and decided_by says so. Returns a verdict (pass, fail or inconclusive), decided_by, scores, format compliance, SLA result, issues, and what code checked.

verify_outcome input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "request_description",
    "response_data"
  ],
  "properties": {
    "service_id": {
      "type": "string",
      "maxLength": 200,
      "description": "Service identifier for quality tracking (e.g. 'harvey-tools/scrape_url')"
    },
    "response_data": {
      "type": "string",
      "maxLength": 100000,
      "description": "The actual response/output received from the service"
    },
    "expected_schema": {
      "type": "string",
      "maxLength": 20000,
      "description": "A JSON Schema, or two or more required top-level field names (letters, digits, _ and -) separated by commas, e.g. 'name, price, url'. Anything else is passed to the AI judge only."
    },
    "sla_requirements": {
      "type": "string",
      "maxLength": 2000,
      "description": "SLA wording for the AI judge (e.g. 'must include all fields'). For a time limit code can check, use the two fields below."
    },
    "request_description": {
      "type": "string",
      "maxLength": 8000,
      "description": "What was requested from the service"
    },
    "sla_max_response_time_ms": {
      "type": "integer",
      "maximum": 3600000,
      "minimum": 0,
      "description": "The response time limit, in milliseconds"
    },
    "observed_response_time_ms": {
      "type": "integer",
      "maximum": 3600000,
      "minimum": 0,
      "description": "The response time you measured, in milliseconds"
    }
  },
  "additionalProperties": false
}
verify_outcome annotations
{
  "paymentHint": true,
  "paymentVersion": 1,
  "paymentNetworks": [
    {
      "type": "svm",
      "asset": {
        "address": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "decimals": 6
      },
      "network": "solana",
      "recipient": "2CkpGoj5cGYdmxSBZYC21AJia9hGjj5bKzCTkyrPzL4H",
      "maxAmountRequired": "10000"
    }
  ],
  "paymentPriceUSD": "$0.01"
}
get_service_quality
Advertised by the server during the last successful anonymous check.

Get aggregated quality scores for a service based on past verifications and reports, counting each paying wallet once (its latest). Returns the pass rate (overall, and over the rows where code checked the format or a measured time), average completeness and accuracy over the scored rows with their count, the count of inconclusive rows, format and SLA compliance rates, and a trend by pass rate. The scores are self-reported by paying wallets and not attested: nothing proves a reporter used the service.

get_service_quality input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "service_id"
  ],
  "properties": {
    "service_id": {
      "type": "string",
      "maxLength": 200,
      "description": "Service identifier to query (e.g. 'harvey-tools/scrape_url')"
    }
  },
  "additionalProperties": false
}
get_service_quality annotations
{
  "paymentHint": true,
  "paymentVersion": 1,
  "paymentNetworks": [
    {
      "type": "svm",
      "asset": {
        "address": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "decimals": 6
      },
      "network": "solana",
      "recipient": "2CkpGoj5cGYdmxSBZYC21AJia9hGjj5bKzCTkyrPzL4H",
      "maxAmountRequired": "5000"
    }
  ],
  "paymentPriceUSD": "$0.005"
}
report_outcome
Advertised by the server during the last successful anonymous check.

Record a simple pass/fail outcome report for a service call. No LLM analysis - just logs the result to the quality database. Cheaper alternative to verify_outcome when you only need to record success/failure.

report_outcome input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "service_id",
    "was_successful"
  ],
  "properties": {
    "notes": {
      "type": "string",
      "maxLength": 2000,
      "description": "Optional notes about the outcome"
    },
    "service_id": {
      "type": "string",
      "maxLength": 200,
      "description": "Service identifier (e.g. 'harvey-tools/scrape_url')"
    },
    "was_successful": {
      "type": "boolean",
      "description": "Whether the service call succeeded"
    },
    "response_time_ms": {
      "type": "integer",
      "maximum": 3600000,
      "minimum": 0,
      "description": "Response time in milliseconds"
    }
  },
  "additionalProperties": false
}
report_outcome annotations
{
  "paymentHint": true,
  "paymentVersion": 1,
  "paymentNetworks": [
    {
      "type": "svm",
      "asset": {
        "address": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "decimals": 6
      },
      "network": "solana",
      "recipient": "2CkpGoj5cGYdmxSBZYC21AJia9hGjj5bKzCTkyrPzL4H",
      "maxAmountRequired": "2000"
    }
  ],
  "paymentPriceUSD": "$0.002"
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (3 of 3 answered).

  1. 2026-11-06: 1 of 1 checks answered
  2. 2026-11-07: 2 of 2 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
748 ms
95th percentile latency
748 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 748 ms · metadata changed · 5 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http harvey-verify-mcp https://verify.rugslayer.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add harvey-verify-mcp --url https://verify.rugslayer.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable harvey-verify-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "harvey-verify-mcp": {
      "url": "https://verify.rugslayer.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "harvey-verify-mcp": {
      "type": "streamableHttp",
      "url": "https://verify.rugslayer.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start harvey-verify-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "harvey-verify-mcp": {
      "type": "http",
      "url": "https://verify.rugslayer.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http harvey-verify-mcp https://verify.rugslayer.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://verify.rugslayer.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "harvey-verify-mcp": {
      "serverUrl": "https://verify.rugslayer.com/mcp"
    }
  }
}

Let your agent find its tools

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