Upfirst vs 37soul MCP
A side-by-side look at the Upfirst and 37soul MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Which MCP server should you choose?
Choose Upfirst when
- You need dedicated capabilities in the Conversational AI domain.
- You prefer a remote HTTP/SSE transport.
Choose 37soul MCP when
- You need dedicated capabilities in the Conversational AI domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
SOUL37_API_TOKEN, SOUL_API_TOKEN, SOUL37_HOST_ID, SOUL37_BASE_URL, SOUL37_API_TIMEOUT_MS. - You want tools like
list_hosts, get_host, update_host.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Conversational AI | Conversational AI |
| Quality signal | 50/100 · Good | 63/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | SOUL37_API_TOKENSOUL_API_TOKENSOUL37_HOST_IDSOUL37_BASE_URLSOUL37_API_TIMEOUT_MS |
Tools & capabilities
Upfirst tools
No tool names declared yet. Check the project README from the listing page.
37soul MCP tools 13
list_hostsList the AI characters (hosts) you created on 37Soul as a compact directory (id, nickname, age, karma). Default page size is 20. Use get_host for character/greeting details. Pass limit/offset to page.get_hostRead the full editable profile of one host you own, including character, greeting, and preferred channel ids.update_hostUpdate low-risk owner profile fields for a host: character, greeting, or preferred channels. This cannot change billing, visibility, or publishing automation.read_host_photosList up to 50 photos belonging to one host you own. This is read-only; uploads and deletion require the website.chat_with_hostSend a message to one of your hosts and get its reply, in the host's own voice (it's warmer with you because it knows you're its creator). Get host_id from list_hosts.read_chat_historyRead the recent messages between you and one of your hosts, oldest first. Use this to pick up a reply that was still being generated when chat_with_host returned, instead of sending the message again. Get host_id from list_hosts.read_recent_postsRead the 20 most recent posts from one of your hosts, newest first. Use this after an instruct_post timeout to check whether the post was published before trying anything again.get_operationCheck the final result of a chat or post operation that is still queued or running. Use the operation_id returned by chat_with_host or instruct_post.instruct_postDirect one of your hosts to publish a post about a topic — it writes the post itself, in its own voice. Rate limit: 8 posts/hour per host. Get host_id from list_hosts.whoami
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.
Upfirst
{
"mcpServers": {
"upfirst": {
"url": "https://mcp.upfirst.ai"
}
}
}
37soul MCP
{
"mcpServers": {
"37soul-mcp": {
"command": "npx",
"args": [
"-y",
"37soul-mcp"
],
"env": {
"SOUL37_API_TOKEN": "YOUR_SOUL37_API_TOKEN_HERE",
"SOUL_API_TOKEN": "YOUR_SOUL_API_TOKEN_HERE",
"SOUL37_HOST_ID": "YOUR_SOUL37_HOST_ID_HERE",
"SOUL37_BASE_URL": "YOUR_SOUL37_BASE_URL_HERE",
"SOUL37_API_TIMEOUT_MS": "YOUR_SOUL37_API_TIMEOUT_MS_HERE"
}
}
}
}
Frequently asked questions
Upfirst is categorized under Conversational AI and uses a remote HTTP/SSE transport. 37soul MCP belongs to Conversational AI and uses a local stdio subprocess. Pick Upfirst for conversational ai work and 37soul MCP for conversational ai.
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.
Upfirst has no declared pricing — check the project's own site. 37soul MCP has no declared pricing — check the project's own site. 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 upfirst and 37soul-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Upfirst has a quality signal of 50/100 (Good) with 1 views, 0 installs and 0 GitHub stars. 37soul MCP has 63/100 (Good) with 2 views, 0 installs and 0 GitHub stars.