Read campaign stats, participants, referrals, ranks and rewards in Viral Loops. For marketers who run referral and giveaway campaigns with Viral Loops. Hosted by usefulapi — connect from Claude, ChatGPT, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"viral-loops": {
"url": "https://viral-loops.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"viral-loops": {
"type": "http",
"url": "https://viral-loops.usefulapi.io/mcp"
}
}
}No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run these commands. The second one opens the login page:
Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
Read the campaign info and the campaign stats, such as participants and referrals.
viralloops_get_campaign_info viralloops_get_campaign_stats
Read the profile, the rank, the join order and the referrals of one participant.
viralloops_get_participant viralloops_get_participant_rank viralloops_get_participant_order viralloops_list_participant_referrals
Read who referred a participant and the people that this participant referred.
viralloops_get_participant_referrer viralloops_list_participant_referrals
List the pending rewards and the rewards already given.
viralloops_list_pending_rewards viralloops_list_given_rewards
The login page asks for your Campaign secret API token.
Find it in the campaign editor under Settings → Installation (the secret API token, not the public token). One token covers one campaign. It is used only to call the API on your behalf.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Campaign secret API token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Turn on the Viral Loops connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
viralloops_get_campaign_stats | read | Campaign stats Get the number of leads and the total referral count of the campaign. Viral Loops API: GET /campaign/stats. |
viralloops_get_campaign_info | read | Campaign info Get the campaign configuration: type, template, company name, landing page, widgets and expiration. Viral Loops API: GET /campaign/data. |
viralloops_get_participant | read | Get participant Get one participant: name, referral code, extra data, rank, referral and points totals, referrer, and pending or redeemed rewards. Viral Loops API: GET /campaign/participant/data. |
viralloops_get_participant_rank | read | Participant rank Get the rank of a participant on the waiting list or leaderboard. Flagged participants are not ranked. Viral Loops API: GET /campaign/participant/rank. |
viralloops_get_participant_order | read | Participant join order Get the order in which a participant joined (1 = first) and the total lead count. Viral Loops API: GET /campaign/participant/order. |
viralloops_list_participant_referrals | read | List participant referrals List the people a participant referred, with paging. Viral Loops API: GET /campaign/participant/referrals. |
viralloops_get_participant_referrer | read | Get participant referrer Get the participant who referred the given participant. Viral Loops API: GET /campaign/participant/referrer. |
viralloops_search_participants | read | Search participants Search the campaign participants with filters and paging. Returns results and the total count. Read-only. Viral Loops API: POST /campaign/participant/search. |
viralloops_query_participants | read | Query participants Get data for a list of participants (by email or referral code), or for the referrals of a list of referrers. Read-only. Viral Loops API: POST /campaign/participant/query. |
viralloops_list_pending_rewards | read | List pending rewards List pending rewards of one participant. Without email and referral code, the API returns a paged list of participants and their pending rewards (use limit and skip). Viral Loops API: GET /campaign/participant/rewards/pending. |
viralloops_list_given_rewards | read | List given rewards List rewards already given to one participant. Without email and referral code, the API returns a paged list of participants and their given rewards (use limit and skip). Viral Loops API: GET /campaign/participant/rewards/given. |
viralloops_usage_status | Usage status (free-tier meter) Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. | |
viralloops_request_feature | Request a missing feature Tell usefulapi that the user needs something the Viral Loops tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. | |
viralloops_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Viral Loops (the free tier caps monthly usage). Plans: "monthly" — $9/month; "yearly" — $90/year (2 months free). Cancel any time: Pro then runs to the end of the paid period, so it also suits a one-time job. *A fair use limit applies. For heavy use (near Pro's limit): "plus" or "plus_yearly" — Pro+, $39/month or $390/year, unlimited tool calls (fair use limit: 100,000 a month); an existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Otherwise returns a short link to open in your browser (it opens Stripe Checkout); after payment the account upgrades automatically. Does not count against the meter. | |
viralloops_cancel_subscription | Cancel the Pro subscription Cancel the caller's Viral Loops Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run viralloops_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited* |
*Pro fair use limit: 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this Viral Loops server only. Subscribe with viralloops_upgrade (it returns a Stripe Checkout link). Cancel any time with viralloops_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running viralloops_upgrade before then undoes the cancel. Or write to [email protected].
Check how a campaign performs. Look up one participant. Trace a referral chain. Prepare reward payouts. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Viral Loops. The server calls the Viral Loops API with your own Viral Loops access, so it sees only the data that your account can see.
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
The login page asks for your Campaign secret API token. See Before you connect for where to find it.
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Campaign secret API token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Viral Loops API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Viral Loops.
All 11 Viral Loops tools are marked read-only.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls (fair use limit: 10,000 tool calls a month), for this Viral Loops server only. Cancel any time: Pro then runs to the end of the paid period. Run viralloops_usage_status to see how many calls you used.
Ask the AI to run viralloops_upgrade: it returns a Stripe Checkout link. To cancel, run viralloops_cancel_subscription. Pro continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with viralloops_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.