MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Data access / search

ReferralHero MCP by usefulapi

Read ReferralHero campaigns, subscribers, referrals and rewards; add subscribers and points.

Checks passed
14 / 22

0 failed · 8 not measured

Median response
53 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
28

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
400
Publisher identityCan the publisher be traced to its source?
402

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 53 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name referralhero-mcp.

  • Pass
    Lists tools

    tools/list returned 28 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 53 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 53 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    143 of 143 parameters have a description (100%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-10T23:34:14.378444Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using ReferralHero MCP by usefulapi

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http referralhero-mcp-by-usefulapi https://referralhero.usefulapi.io/mcp

Capabilities

Tools 28

referralhero_add_coupons

WRITE: add coupon codes to an existing coupon group. It only adds codes. POST /lists/{uuid}/coupons.

Discovered
referralhero_add_points

WRITE: add points to an existing subscriber (not idempotent: each call adds again). May unlock point-based rewards. The subscriber is identified by the campaign's unique identifier. POST /lists/{uuid}/subscribers/add_points.

Discovered
referralhero_add_subscriber

WRITE: add a subscriber (or a referred person) to a campaign. Give the campaign's unique identifier (email, phone, wallet or custom id). By default ReferralHero sends the subscriber a confirmation (double opt-in) email and any welcome automation of the campaign: set double_optin=false to suppress the confirmation email. Set referrer (a referral code or the referrer's email) to credit a referral. POST /lists/{uuid}/subscribers.

Discovered
referralhero_confirm_referral

WRITE: confirm a verified referral when its third conversion event happens (campaigns whose goal tracks three events; otherwise ReferralHero returns an error). Confirming can unlock the referrer's rewards and send reward emails. Identify the referral by subscriber_id, or by the campaign's unique identifier. POST /lists/{uuid}/subscribers/{id}/confirm or /subscribers/confirm.

Discovered
referralhero_create_campaign

WRITE: create a new ReferralHero campaign (list) with a name and a default referral URL. It adds a campaign and changes nothing existing. POST /lists.

Discovered
referralhero_create_coupon_group

WRITE: create a coupon group for a campaign, optionally with its first coupon codes. It only adds a group. POST /lists/{uuid}/coupon_groups.

Discovered
referralhero_delete_subscriber

WRITE, DESTRUCTIVE: permanently delete a subscriber from a campaign, with their referral standing. This cannot be undone. DELETE /lists/{uuid}/subscribers/{id}.

Discovered
referralhero_get_coupon_group

One coupon group with all its coupons (code, available, sent_at). GET /lists/{uuid}/coupon_groups/{id}.

Discovered
referralhero_get_leaderboard

The leaderboard of a campaign: its top subscribers (10 to 100) with referral counts, points and position. GET /lists/{uuid}/leaderboard.

Discovered
referralhero_get_subscriber

One subscriber by id: contact data, referral code and link, points, position, referrals by level, status, fraud risk level, tags. Only verified subscribers are found. GET /lists/{uuid}/subscribers/{id}.

Discovered
referralhero_get_subscriber_by_email

Find one subscriber of a campaign by email. Only verified subscribers are found. GET /lists/{uuid}/subscribers/retrieve_by_email.

Discovered
referralhero_get_subscriber_by_referral_code

Find the subscriber who owns a referral code (the mwr value in a referral link). Only verified subscribers are found. GET /lists/{uuid}/subscribers/retrieve_by_mwr.

Discovered
referralhero_list_campaign_rewards

The rewards configured for a campaign (title, description, referrals needed to win each). This is the reward setup, not who earned what: see referralhero_list_unlocked_rewards for that. GET /lists/{uuid}/bonuses.

Discovered
referralhero_list_campaigns

List the active ReferralHero campaigns (lists) in the account: uuid, name, subscriber count and creation time. The uuid is needed by every other tool. 10 per page. GET /lists.

Discovered
referralhero_list_coupon_groups

Coupon groups of a campaign (id, name, active flag, coupons with availability), 50 per page. GET /lists/{uuid}/coupon_groups.

Discovered
referralhero_list_referrals

The people a subscriber referred, 50 per page. scope: all (pending, unconfirmed and confirmed, default), level_1_confirmed, level_2_confirmed, level_3_confirmed (confirmed only, by referral level), level_2_all or level_3_all (every status at that level). GET /lists/{uuid}/subscribers/{id}/{referred|level_N_referrals|level_N_all_referrals}.

Discovered
referralhero_list_subscriber_rewards

Rewards one subscriber has unlocked, with status, value and coupon code. The reward id is what referralhero_update_reward_status needs. GET /lists/{uuid}/subscribers/{id}/rewards.

Discovered
referralhero_list_subscribers

List the subscribers of a campaign, 50 per page, with referral code, referral link, points, position, people referred, status and referrer. Sort and filter by the extra fields. GET /lists/{uuid}/subscribers.

Discovered
referralhero_list_unlocked_rewards

Rewards unlocked by subscribers across a whole campaign: reward name, status (sent, resent, canceled, pending, flagged), value, subscriber email and id, coupon code, transaction. Filter by status to find rewards still to pay out. GET /lists/{uuid}/rewards.

Discovered
referralhero_promote_subscriber

WRITE: promote a subscriber to the campaign's winners list (contests and giveaways). Only verified subscribers can be promoted; an already promoted subscriber returns an error. POST /lists/{uuid}/subscribers/{id}/promote.

Discovered
referralhero_qualify_referral

WRITE: mark a referral as qualified, so it counts toward the referrer's rewards. POST /lists/{uuid}/subscribers/{id}/qualify.

Discovered
referralhero_search_subscribers_by_name

Search subscribers by name across all campaigns of the account, 50 per page. GET /subscribers/search_by_name.

Discovered
referralhero_track_conversion_event

WRITE: report a conversion event for a referral (campaigns whose goal tracks two or three events). Updates the referral from pending to confirmed (two events) or unconfirmed (three). If the referral is unknown but a referrer is given, the referral is created. May unlock rewards. POST /lists/{uuid}/subscribers/track_referral_conversion_event.

Discovered
referralhero_track_transaction

WRITE: record a purchase/transaction for a subscriber (amount required) so revenue-based rewards and reports count it (not idempotent unless a transaction_id is reused). The subscriber is identified by the campaign's unique identifier. POST /lists/{uuid}/subscribers/add_transactions.

Discovered
referralhero_unlock_promoted_reward

WRITE: unlock a promoted-winner or one-off reward for a subscriber. This delivers the reward and may email the subscriber and use coupon codes. POST /lists/{uuid}/subscribers/{id}/unlock_promoted_reward.

Discovered
referralhero_unqualify_referral

WRITE: mark a referral as unqualified (for example fraud or a refund), so it no longer counts toward the referrer's rewards. POST /lists/{uuid}/subscribers/{id}/unqualify.

Discovered
referralhero_update_reward_status

WRITE: set the status of an unlocked reward to sent, resent or canceled. Marking sent/resent can trigger the reward delivery email to the subscriber. Get the reward_id from referralhero_list_subscriber_rewards or referralhero_list_unlocked_rewards. POST /lists/{uuid}/subscribers/update_reward_status.

Discovered
referralhero_update_subscriber

WRITE: change fields of a subscriber (overwrites the given fields): name, contact identifiers, extra fields, points (contest campaigns), tags, address, referral status (qualified/unqualified). Only fields you pass change. Only verified subscribers can be updated. POST /lists/{uuid}/subscribers/{id}.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected53 ms28