Find B2B leads with verified work emails, find and verify emails, and run cold email outreach.
Marketing & SalesCommunication & messaging
- Passed: Handshake
- Passed: Tools listed
- Passed: Updated recently
Median latency 173 ms · Last checked
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Evidence for your next connection.
Independent measurements of remote MCP servers. Every observation has a timestamp.
Read-only probesMCP server · Communication & messaging
Read SlickText contacts, lists, campaigns, analytics and inbox; create and update contacts.
1 failed · 8 not measured
Median of successful probes over 7 days
Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.
Tool definitions returned by this server
Independent monitoring
Outdated check
Last connection measurement is over 24 hours old. Current availability is unknown.
Last checked| Test area | Passed | Failed | Unmeasured |
|---|---|---|---|
ConnectionCan a client connect and discover tools? | 5 | 0 | 0 |
Reliability & speedDoes it respond consistently and quickly? | 0 | 0 | 4 |
Access & authenticationWhat is required to use this server? | 1 | 0 | 2 |
Tool qualityAre the tool definitions usable by an agent? | 3 | 1 | 0 |
Publisher identityCan the publisher be traced to its source? | 4 | 0 | 2 |
Unmeasured means there is not enough evidence to decide. How these checks work
Start using SlickText MCP by usefulapi
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 slicktext-mcp-by-usefulapi https://slicktext.usefulapi.io/mcpCapabilities
WRITE: add one contact to one or more contact lists (it does not change the contact's opt-in status; lists are also campaign audiences). Returns SlickText's count of memberships added. WARNING: SlickText workflows can trigger on this event (Contact Created / Contact Field Changed / Contact Added to List) and may immediately SEND REAL TEXTS or take other actions configured in the brand's workflows. POST /brands/{brand_id}/lists/contacts.
DiscoveredWRITE: add a contact to the brand. By default the contact is created as 'not subscribed' and gets no text. Set opt_in_status='subscribed' ONLY for people who gave explicit permission to receive texts (SlickText has a zero-tolerance policy for unsolicited texts). force_double_opt_in=true makes SlickText SEND A REAL SMS to the number asking the person to confirm. Check slicktext_find_contact first to avoid duplicates. WARNING: SlickText workflows can trigger on this event (Contact Created / Contact Field Changed / Contact Added to List) and may immediately SEND REAL TEXTS or take other actions configured in the brand's workflows. POST /brands/{brand_id}/contacts.
DiscoveredFind contacts by mobile number or email address (exact match). A 10-digit US number is matched as +1XXXXXXXXXX, the way SlickText stores numbers. Use it before creating a contact to avoid duplicates. GET /brands/{brand_id}/contacts?mobile_number=… or ?email=….
DiscoveredBrand-level analytics. metric: contacts (current totals), contact_growth, contact_add_delete_events, opt_in_status_events, campaigns, messages (messages sent), message_credits, inbox_users (assignments, closures, response times per user), inbox_tags. Optional group (allowed per metric — contacts: source|opt_in_status; contact_growth/campaigns: contact_source; contact_add_delete_events: contact_source|type; opt_in_status_events: contact_source|contact_unsubscribe_source|opt_in_status; messages: source|status|direction|weekday; message_credits: source|status), a start/end range, frequency (hour/day/month/year) and compare (YoY, QoQ, MoM, WoW, DoD, PoP). GET /brands/{brand_id}/analytics/….
DiscoveredGet the SlickText brand this API key belongs to: brand_id, name, website, sending-number registration details, opt-in / double-opt-in messages, inbox settings and the message credit limit. Every other tool works within this brand. GET /brands.
DiscoveredGet one campaign by id: body, media_url, status, audience_size, schedule and completion. GET /brands/{brand_id}/campaigns/{id}.
DiscoveredPerformance of one campaign: contacts reached, clicks, click_rate, unique clicks, unsubscribes, unsubscribe_rate, orders, revenue, average order value, revenue per message, plus the campaign, its audiences and links. GET /brands/{brand_id}/analytics/campaigns/{id}.
DiscoveredGet one contact by id: name, mobile_number, email, birthdate, address, opt_in_status, source, custom_fields, time zone and dates. GET /brands/{brand_id}/contacts/{id}.
DiscoveredGet the content of one inbox conversation by its id (the _id from slicktext_list_conversations). For the message-by-message history also call slicktext_list_messages with source=InboxThread and source_id=<conversation id>. GET /brands/{brand_id}/inbox-threads/{id}/content.
DiscoveredMessage credits for the current billing period: total_credits (subscription + rollover + purchased), credits_used, credits_available and the credit limit. GET /brands/{brand_id}/usage.
DiscoveredGet one keyword by id, including the contact_list_ids that people who text it are added to. GET /brands/{brand_id}/keywords/{id}.
DiscoveredGet one contact list by id plus its contact count (all statuses: subscribed, not subscribed, unsubscribed, blocked). GET /brands/{brand_id}/lists/{id} and /lists/{id}/contacts/count.
DiscoveredList the brand's SMS/MMS campaigns: name, body, status (e.g. draft, scheduled, queued, sent), scheduled/started/finished times, completion_percentage and audience (lists/segments and size). GET /brands/{brand_id}/campaigns.
DiscoveredList the brand's contacts (subscribers) with name, mobile_number, email, opt_in_status, source, custom_fields and dates. Filters are exact, case-sensitive matches (SlickText has no partial search). Paged: returns count, has_more and next_offset. GET /brands/{brand_id}/contacts.
DiscoveredList two-way inbox conversations: status (open, pending, closed), the contact, the last message and its direction/time, assigned user, tags and unread state. GET /brands/{brand_id}/inbox-threads.
DiscoveredList the brand's contact custom fields: name, internal_name (the key used in contact filters and writes), data_type and description. GET /brands/{brand_id}/custom-fields.
DiscoveredList the inbox tags used to label conversations (inbox_tag_id, name, color, description). GET /brands/{brand_id}/inbox-tags.
DiscoveredList the brand's text-to-join keywords (word, description, active, auto-response and opt-in messages, double opt-in). GET /brands/{brand_id}/keywords.
DiscoveredList the contacts in one contact list (paged). GET /brands/{brand_id}/lists/{id}/contacts.
DiscoveredList the brand's contact lists (contact_list_id, name, description, created). Optional exact name filter. GET /brands/{brand_id}/lists.
DiscoveredList individual SMS/MMS messages sent and received by the brand: to, from, body, direction, source (Campaign, Keyword, InboxThread, API …), status (delivered, undelivered …), credits and the contact. Filters are exact matches; use to/from with a phone number to read one contact's history, or source=InboxThread with source_id = a conversation id. GET /brands/{brand_id}/messages.
DiscoveredList the contacts that currently match one segment (paged). GET /brands/{brand_id}/segments/{id}/contacts.
DiscoveredList the brand's segments (rule-based contact groups: segment_id, name, description). GET /brands/{brand_id}/segments.
DiscoveredWRITE: change fields of an existing contact (only the fields you pass are sent). opt_in_status can mark a contact unsubscribed or blocked; set it to 'subscribed' ONLY when the person explicitly agreed to receive texts. WARNING: SlickText workflows can trigger on this event (Contact Created / Contact Field Changed / Contact Added to List) and may immediately SEND REAL TEXTS or take other actions configured in the brand's workflows. PUT /brands/{brand_id}/contacts/{id}.
DiscoveredRecent measurements
| Checked | Result | Response | Tools |
|---|---|---|---|
| Connected | 58 ms | 24 |