Koskamo

US H-1B Visa Sponsors MCP

An MCP server providing access to USCIS H-1B Employer Data Hub data, allowing agents to check if employers sponsor visas, search for sponsors by location and industry, and retrieve detailed approval rates for lead generation by recruiters and job-seekers.

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.

US H-1B Visa Sponsors MCP logo, by Donnie MorrisonCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-01Published by Donnie Morrison
MCP endpoint (Streamable HTTP)
https://us-visa-sponsors-mcp.donniertf.workers.dev/mcp
Vendor documentation

What you can do with it

  • Check if a specific US employer sponsors H-1B visas
  • Search for H-1B sponsors by state, city, or industry
  • Retrieve detailed approval and denial rates for an employer

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.donniertf-hub/us-visa-sponsors-mcp@1.0.0Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
us-visa-sponsors-mcp 1.0.0
MCP protocol
2025-06-18
Tools
3 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

US H-1B Visa Sponsors. h1b_check is free. Subscribe ($15/month, cancel anytime) at https://us-visa-sponsors-mcp.donniertf.workers.dev/buy for the paid tools, then pass access_token.

Tools

3 advertised

h1b_check
Advertised by the server during the last successful anonymous check.

FREE. Does this US employer sponsor H-1B visas? Approvals/denials from the USCIS H-1B Employer Data Hub — top 3 matches.

h1b_check input schema
{
  "type": "object",
  "required": [
    "employer"
  ],
  "properties": {
    "employer": {
      "type": "string"
    }
  }
}
sponsor_search
Advertised by the server during the last successful anonymous check.

PRO. H-1B sponsors by state, city and/or NAICS industry prefix, ranked by approvals — lead lists for recruiters, immigration lawyers and job-seekers.

sponsor_search input schema
{
  "type": "object",
  "properties": {
    "city": {
      "type": "string"
    },
    "limit": {
      "type": "number"
    },
    "naics": {
      "type": "string"
    },
    "state": {
      "type": "string"
    },
    "access_token": {
      "type": "string",
      "description": "Subscriber token from /success (or Authorization: Bearer)"
    },
    "min_approvals": {
      "type": "number"
    }
  }
}
employer_detail
Advertised by the server during the last successful anonymous check.

PRO. All rows for an employer (each location/tax ID) with approval rate.

employer_detail input schema
{
  "type": "object",
  "required": [
    "employer"
  ],
  "properties": {
    "employer": {
      "type": "string"
    },
    "access_token": {
      "type": "string",
      "description": "Subscriber token from /success (or Authorization: Bearer)"
    }
  }
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

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
553 ms
95th percentile latency
553 ms

Maintenance history

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

  • · probe · passed · 553 ms · metadata changed · 3 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 us-h-1b-visa-sponsors-mcp https://us-visa-sponsors-mcp.donniertf.workers.dev/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 us-h-1b-visa-sponsors-mcp --url https://us-visa-sponsors-mcp.donniertf.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable us-h-1b-visa-sponsors-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "us-h-1b-visa-sponsors-mcp": {
      "url": "https://us-visa-sponsors-mcp.donniertf.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "us-h-1b-visa-sponsors-mcp": {
      "type": "streamableHttp",
      "url": "https://us-visa-sponsors-mcp.donniertf.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start us-h-1b-visa-sponsors-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "us-h-1b-visa-sponsors-mcp": {
      "type": "http",
      "url": "https://us-visa-sponsors-mcp.donniertf.workers.dev/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 us-h-1b-visa-sponsors-mcp https://us-visa-sponsors-mcp.donniertf.workers.dev/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "us-h-1b-visa-sponsors-mcp": {
      "url": "https://us-visa-sponsors-mcp.donniertf.workers.dev/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": {
    "us-h-1b-visa-sponsors-mcp": {
      "serverUrl": "https://us-visa-sponsors-mcp.donniertf.workers.dev/mcp"
    }
  }
}

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