_ registry / mcp streamable-http · checked 1h ago

sendburg

https://app.send-burg.com

Registry code: 734e5999ac2dddad

api record

Search 250M+ B2B contacts and 25M+ companies; reveal verified work emails and phone numbers.

from a public catalogue that lists it, not from the operator

endpoint
https://app.send-burg.com/mcp
protocol
streamable-http ·2024-11-05
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is sendburg live?
Yes — it answered the hub's last check (checked 1h ago). It answered 100% of checks over the last 30 days.
Is sendburg free to use?
Not anonymously — it asks for a key or a login before it will serve. Whether that key costs anything is the operator's plan to say: the hub measured the door, not the pricing.
What tools does sendburg have?
9 tools: search_companies, reveal_contact_phone, get_company, get_user_info, search_contacts, get_contacts_at_company, reveal_contact_email, get_credit_balance, ….
Is sendburg safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
100%

90 days 100%· all time 100%

latency
667ms

last good check

priced tools
0

of 9 tools

_ answered our checks, 90 days 1 checks · signed record
  • unknown → live
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 9 tools
9 auth-required 9 of 9 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • search_companies auth-required 1h ago

    Search Sendburg's B2B company database with 25M+ companies. Filter by industry, country, city, state, employee size, technology stack, keywords, revenue range, and funding. Use offset for pagination to access all results.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "limit": {
      "type": "number",
      "default": 10,
      "maximum": 100,
      "description": "Results to return (max 100, default 10)"
    },
    "query": {
      "type": "string",
      "description": "Company name or keyword search"
    },
    "cities": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "City filter (e.g. \"San Francisco\", \"New York\", \"London\"). Multiple values OR-ed."
    },
    "offset": {
      "type": "number",
      "default": 0,
      "description": "Pagination offset (default 0)."
    },
    "states": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "State/region filter (e.g. \"California\", \"CA\", \"Texas\", \"New York\"). Abbreviations accepted."
    },
    "keywords": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Keyword search across technologies, specialties, and company description."
    },
    "countries": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Country filter (e.g. \"United States\", \"India\", \"United Kingdom\", \"Germany\"). Multiple values OR-ed."
    },
    "hasFunding": {
      "type": "boolean",
      "description": "If true, only companies that have received funding. If false, only unfunded."
    },
    "industries": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Industry filter (e.g. \"Software Development\", \"Financial Services\", \"Hospitals & Health Care\", \"E-commerce\", \"Cybersecurity\", \"Artificial Intelligence\", \"Manufacturing\"; common terms such as SaaS, Fintech, Healthcare, AI or Edtech are understood). Multiple values OR-ed."
    },
    "employeeSize": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Employee range buckets: \"1-10\", \"11-50\", \"51-200\", \"201-500\", \"501-1000\", \"1001-5000\", \"5001+\". Multiple values OR-ed."
    },
    "fundingRound": {
      "type": "string",
      "description": "Latest funding stage: \"Seed\", \"Series A\", \"Series B\", \"Series C\", \"Series D\", \"IPO\", \"Bootstrapped\""
    },
    "revenueRange": {
      "type": "string",
      "description": "Annual revenue range: \"$0-1M\", \"$1-10M\", \"$10-50M\", \"$50-100M\", \"$100M+\""
    },
    "technologies": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Technology stack filter (e.g. \"Salesforce\", \"HubSpot\", \"AWS\", \"Shopify\", \"Stripe\"). Multiple values OR-ed."
    }
  }
}
    arguments 81 lines
  • reveal_contact_phone auth-required never probed

    Reveal the verified phone number of a contact. Costs 10 Sendburg credits. Returns the phone number and your remaining credit balance. Use search_contacts or get_contacts_at_company to get a contactId first.

    mcp-tool

    {
  "type": "object",
  "required": [
    "contactId"
  ],
  "properties": {
    "contactId": {
      "type": "number",
      "description": "Sendburg contact/person ID"
    }
  }
}
    arguments 12 lines
  • get_company auth-required 1h ago

    Get full company profile by ID (from search_companies), domain, or name. Returns description, technologies, social links, funding details, employee count, revenue, and founding year.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "id": {
      "type": "number",
      "description": "Sendburg company ID (from search_companies results)"
    },
    "name": {
      "type": "string",
      "description": "Company name (exact or partial match)"
    },
    "domain": {
      "type": "string",
      "description": "Company website domain (e.g. \"stripe.com\", \"hubspot.com\")"
    }
  }
}
    arguments 17 lines
  • get_user_info auth-required 1h ago

    Get your Sendburg account info: email, plan, credit balance, and usage stats. Useful to verify your connection is working and check your current plan.

    mcp-tool

    {
  "type": "object",
  "properties": {}
}
    arguments 4 lines
  • search_contacts auth-required never probed

    Search Sendburg's B2B contact database with 250M+ professionals. Filter by job title, seniority, department, country, city, state, industry, company size, technologies, keywords, and more. Set verifiedOnly:true (alongside another filter) to return ONLY contacts with a verified email. Every result includes emailStatus (verified / catch_all / unverified / invalid) so you can target verified contacts before spending a credit. Emails are masked — use reveal_contact_email to unlock (1 credit). Use offset for pagination.

    mcp-tool

    {
  "type": "object",
  "properties": {
    "limit": {
      "type": "number",
      "default": 10,
      "maximum": 100,
      "description": "Results to return (max 100, default 10)"
    },
    "query": {
      "type": "string",
      "description": "Name or keyword search"
    },
    "cities": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "City filter (e.g. \"San Francisco\", \"New York\", \"London\"). Multiple values OR-ed."
    },
    "offset": {
      "type": "number",
      "default": 0,
      "description": "Pagination offset (default 0)."
    },
    "states": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "State/region filter (e.g. \"California\", \"CA\", \"Texas\"). Multiple values OR-ed."
    },
    "industry": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Filter by company industry (e.g. \"Software Development\", \"Financial Services\", \"Hospitals & Health Care\", \"E-commerce\", \"Cybersecurity\", \"Artificial Intelligence\", \"Manufacturing\"; common terms such as SaaS, Fintech, Healthcare, AI or Edtech are understood). Multiple values OR-ed."
    },
    "keywords": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Keyword search across company technologies, specialties, and description."
    },
    "companyId": {
      "type": "number",
      "description": "Filter contacts at a specific company by Sendburg company ID (from search_companies)"
    },
    "countries": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Country filter (e.g. \"United States\", \"India\", \"United Kingdom\"). Multiple values OR-ed."
    },
    "jobTitles": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Job title filter (e.g. \"CTO\", \"Head of Sales\", \"VP Engineering\", \"Marketing Director\"). Multiple values OR-ed."
    },
    "seniority": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Seniority levels: \"c_suite\", \"owner\", \"head\", \"director\", \"manager\", \"senior\", \"entry\". Multiple values OR-ed."
    },
    "companyName": {
      "type": "string",
      "description": "Filter contacts at a specific company by name"
    },
    "departments": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Department filter (e.g. \"Engineering\", \"Sales\", \"Marketing\", \"Finance\", \"Operations\"). Multiple values OR-ed."
    },
    "employeeSize": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Filter by company employee size: \"1-10\", \"11-50\", \"51-200\", \"201-500\", \"501-1000\", \"1001-5000\", \"5001+\". Multiple values OR-ed."
    },
    "fundingRound": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Filter by company funding stage: \"Seed\", \"Series A\", \"Series B\", \"Series C\", \"IPO\". Multiple values OR-ed."
    },
    "technologies": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Filter contacts whose company uses specific technologies (e.g. \"Salesforce\", \"HubSpot\", \"AWS\"). Multiple values OR-ed."
    },
    "verifiedOnly": {
      "type": "boolean",
      "default": false,
      "description": "When true, return ONLY contacts whose email is verified (email_status = verified). Combine with at least one other filter (e.g. jobTitles or industry) for it to take effect."
    }
  }
}
    arguments 110 lines
  • get_contacts_at_company auth-required never probed

    Find people working at a specific company. Use after search_companies to get the companyId. Emails are masked — use reveal_contact_email to unlock. Useful for finding all decision makers at a target account.

    mcp-tool

    {
  "type": "object",
  "required": [
    "companyId"
  ],
  "properties": {
    "limit": {
      "type": "number",
      "default": 10,
      "maximum": 25,
      "description": "Results to return (max 25, default 10)"
    },
    "jobTitle": {
      "type": "string",
      "description": "Filter by job title keyword (e.g. 'Sales', 'Engineer')"
    },
    "companyId": {
      "type": "number",
      "description": "Sendburg company ID (from search_companies results)"
    },
    "seniority": {
      "type": "string",
      "description": "Seniority level: \"c_suite\", \"owner\", \"head\", \"director\", \"manager\", \"senior\", \"entry\""
    }
  }
}
    arguments 26 lines
  • reveal_contact_email auth-required never probed

    Reveal the full email address of a contact. Costs 1 Sendburg credit per reveal. The contactId comes from search_contacts or get_contacts_at_company. The email is RE-VERIFIED live at unlock time — the response includes the fresh verification status (verified/catch_all/unverified/invalid) and a `verified` boolean. If it comes back invalid, or was listed as verified but downgrades on the fresh check, the credit is automatically refunded (you keep the address). Also returns your remaining credit balance.

    mcp-tool

    {
  "type": "object",
  "required": [
    "contactId"
  ],
  "properties": {
    "contactId": {
      "type": "number",
      "description": "Sendburg contact/person ID (from search_contacts or get_contacts_at_company)"
    }
  }
}
    arguments 12 lines
  • get_credit_balance auth-required never probed

    Check your Sendburg credit balance. Credits are consumed when revealing contact emails (1 credit) or phone numbers (30-100 credits depending on the source). Top up at app.send-burg.com/billing.

    mcp-tool

    {
  "type": "object",
  "properties": {}
}
    arguments 4 lines
  • bulk_reveal_emails auth-required never probed

    Reveal email addresses for multiple contacts at once (up to 10). Each reveal costs 1 credit. Skips contacts whose emails are already revealed (free). Revealed emails are re-verified in the background — any that come back invalid or downgrade from verified are automatically refunded to your balance within about a minute. Returns emails, per-contact status, and total credits used.

    mcp-tool

    {
  "type": "object",
  "required": [
    "contactIds"
  ],
  "properties": {
    "contactIds": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "maxItems": 10,
      "description": "Array of Sendburg contact IDs (max 10). Get IDs from search_contacts or get_contacts_at_company."
    }
  }
}
    arguments 16 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id 734e5999ac2dddad.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/734e5999ac2dddad/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/734e5999ac2dddad/badge.svg)](https://brick.blue/agent/734e5999ac2dddad?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.