Openapi MCP vs HAL
A side-by-side look at the Openapi MCP and HAL MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Openapi MCP for developer tools work as a local process; choose HAL for developer tools as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Openapi MCP when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
API_TOKEN, OAUTH_CLIENT_ID, OAUTH_CLIENT_SECRET, OAUTH_REFRESH_TOKEN, OAUTH_TOKEN_URL, OAUTH_SCOPE, API_HEADERS, TOOL_FILTER.
Choose HAL when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You have the keys it needs:
HAL_SWAGGER_FILE, HAL_API_BASE_URL, HAL_SECRET_API_KEY, HAL_WHITELIST_URLS, HAL_BLACKLIST_URLS, HAL_ALLOW_MICROSOFT. - You want tools like
http-get, http-post, http-put.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 36/100 · Fair | 61/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | No auth required |
| Pricing | Not declared | Free |
| Required env vars | API_TOKENOAUTH_CLIENT_IDOAUTH_CLIENT_SECRETOAUTH_REFRESH_TOKENOAUTH_TOKEN_URLOAUTH_SCOPEAPI_HEADERS |
Tools & capabilities
Openapi MCP tools
No tool names declared yet. Check the project README from the listing page.
HAL tools 8
http-getMake an HTTP GET request to a specified URL. Supports secret substitution using {secrets.key} syntax where 'key' corresponds to HAL_SECRET_KEY environment variables.http-postMake an HTTP POST request to a specified URL with optional body and headers. Supports secret substitution using {secrets.key} syntax in URL, headers, and body where 'key' corresponds to HAL_SECRET_KEY environment variables.http-putMake an HTTP PUT request to a specified URL with optional body and headers. Supports secret substitution using {secrets.key} syntax in URL, headers, and body where 'key' corresponds to HAL_SECRET_KEY environment variables.http-patchMake an HTTP PATCH request to a specified URL with optional body and headers. Supports secret substitution using {secrets.key} syntax in URL, headers, and body where 'key' corresponds to HAL_SECRET_KEY environment variables.http-deleteMake an HTTP DELETE request to a specified URL with optional headers. Supports secret substitution using {secrets.key} syntax in URL and headers where 'key' corresponds to HAL_SECRET_KEY environment variables.http-headMake an HTTP HEAD request to a specified URL with optional headers (returns only headers, no body). Supports secret substitution using {secrets.key} syntax in URL and headers where 'key' corresponds to HAL_SECRET_KEY environment variables.http-optionsMake an HTTP OPTIONS request to a specified URL to check available methods and headers. Supports secret substitution using {secrets.key} syntax in URL and headers where 'key' corresponds to HAL_SECRET_KEY environment variables.list-secretsGet a list of available secret keys that can be used with {secrets.key} syntax. Only shows the key names, never the actual secret values.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Openapi MCP
{
"mcpServers": {
"openapi-mcp-2": {
"command": "npx",
"args": [
"-y",
"@asthanaji/openapi-mcp"
],
"env": {
"API_TOKEN": "YOUR_API_TOKEN_HERE",
"OAUTH_CLIENT_ID": "YOUR_OAUTH_CLIENT_ID_HERE",
"OAUTH_CLIENT_SECRET": "YOUR_OAUTH_CLIENT_SECRET_HERE",
"OAUTH_REFRESH_TOKEN": "YOUR_OAUTH_REFRESH_TOKEN_HERE",
"OAUTH_TOKEN_URL": "YOUR_OAUTH_TOKEN_URL_HERE",
"OAUTH_SCOPE": "YOUR_OAUTH_SCOPE_HERE",
"API_HEADERS": "YOUR_API_HEADERS_HERE",
"TOOL_FILTER": "YOUR_TOOL_FILTER_HERE"
}
}
}
}
HAL
{
"mcpServers": {
"hal": {
"command": "npx",
"args": [
"-y",
"hal-mcp"
],
"env": {
"HAL_SWAGGER_FILE": "YOUR_HAL_SWAGGER_FILE_HERE",
"HAL_API_BASE_URL": "YOUR_HAL_API_BASE_URL_HERE",
"HAL_SECRET_API_KEY": "YOUR_HAL_SECRET_API_KEY_HERE",
"HAL_WHITELIST_URLS": "YOUR_HAL_WHITELIST_URLS_HERE",
"HAL_BLACKLIST_URLS": "YOUR_HAL_BLACKLIST_URLS_HERE",
"HAL_ALLOW_MICROSOFT": "YOUR_HAL_ALLOW_MICROSOFT_HERE"
}
}
}
}
Frequently asked questions
Openapi MCP is categorized under Developer Tools and uses a local stdio subprocess. HAL belongs to Developer Tools and uses a local stdio subprocess. Pick Openapi MCP for developer tools work and HAL for developer tools.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Openapi MCP has no declared pricing — check the project's own site. HAL is listed as free. Auth: no auth required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add openapi-mcp-2 and hal as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Openapi MCP has a quality signal of 36/100 (Fair) with 0 views, 0 installs and 0 GitHub stars. HAL has 61/100 (Good) with 2 views, 0 installs and 38 GitHub stars.
