webhook-inbox MCP Server

by kymac-inbox Your server? Claim it

answering

webhook-inbox is answering right now. Last checked 11 min ago. It exposes 15 tools.

Ephemeral HTTPS inbox for bots: mint URL, capture POSTs, list JSON. TEST. https://inbox.kymac.co

Uptime history 22 hours of history

22 hours agonow

100.0%

Uptime 24h

83 of 83 checks

Tools

read from the server

455 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check webhook-inbox every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add webhook-inbox --transport http https://inbox.kymac.co/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "webhook-inbox": {
      "url": "https://inbox.kymac.co/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.webhook-inbox]
url = "https://inbox.kymac.co/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "webhook-inbox": {
      "url": "https://inbox.kymac.co/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "webhook-inbox": {
      "url": "https://inbox.kymac.co/mcp"
    }
  }
}

Available tools 15

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

credit

credit_balance

Derived prepaid balance for this caller_id (GET /credits/balance).

credit_events

Append-only Ledger events for this caller_id (GET /credits/events): credit.grant (first_key), credit.purchase, credit.debit reason=inbox_mint, optional credit.balance_snapshot.

list_credit_packs

Prepaid TEST packs (GET /credits/packs). checkout_credits is intent only; credits grant after confirm_credits.

revoke

revoke_inbox

Stop further captures (DELETE /inbox/{id}). Does not refund the mint debit. Owner only.

revoke_key

Invalidate the presented secret (POST /keys/revoke). Same id is revoked; old secret then fails 401 invalid_api_key. Prefer Authorization: Bearer; X-API-Key is an alias only. No ops file-edit.

capture

capture_inbox

Public capture (POST /c/{id}). No API key. No debit. Not an install entry. Stores raw body + headers for list_inbox_events. Rejects revoked (410 inbox_revoked) or expired (410 inbox_expired) inboxes. Body limit 1MB.

checkout

checkout_credits

Stripe TEST PaymentIntent for a pack (POST /credits/checkout). Intent only — returns credits_pending; credits are not granted or spendable until confirm_credits succeeds. Requires a caller key.

confirm

confirm_credits

Confirm a TEST PaymentIntent with Stripe test card pm_card_visa (POST /credits/confirm). This is when credits become granted/spendable (appends credit.purchase with credits_added). TEST only.

health

health

Public readiness (GET /health): billing (test|live|gated) and runner_ready. No key.

inbox

list_inbox_events

Owner list (GET /inbox/{id}/events). Returns captured POSTs as JSON (headers + body). Does not debit. Other callers see 404.

issue

issue_key

Mint a caller key (POST /keys). Bot install starts at GET https://inbox.kymac.co/llms.txt (sole advertised entry). Secret whi_… is returned once. Prefer Authorization: Bearer; X-API-Key is an alias. First issue grants 1 free credit (credit.grant reason=first_key). Quote cost with quote_credits before mint_inbox.

mint

mint_inbox

Mint a capture URL (POST /inbox). Install via GET https://inbox.kymac.co/llms.txt only. Prefer Authorization: Bearer; X-API-Key is an alias. First key includes 1 free credit. Quote first with quote_credits (no debit). Debits 1 credit on success (credit.debit reason=inbox_mint, request_id=inbox id). 201 body includes id, capture_url, expires_at, credits_remaining. HTTP fails use code/message/retryable/next (error aliases message). 401 next=refresh key. 402: code=insufficient_credits, retryable=false, next=buy credits.

quote

quote_credits

Dry-run cost for an op without debit (GET /credits/quote?op=inbox). Returns cost, balance, and would_succeed.

rotate

rotate_key

Replace the presented secret (POST /keys/rotate). Same id/caller_id and credits. New whi_… is returned once. Old secret then fails 401 invalid_api_key. Prefer Authorization: Bearer; X-API-Key is an alias only. No ops file-edit.

verify

verify_key

Confirm WEBHOOK_INBOX_API_KEY or Authorization: Bearer (GET /keys/verify). X-API-Key is an alias only. Does not echo the secret.

Endpoints

URL	Transport	State	Latency	Checked
https://inbox.kymac.co/mcp	streamable-http	answering	444 ms	11 min ago

Alternatives to webhook-inbox

same job, measured the same way

pdf-text

by kymac-pdf

PDF URL → extracted text for bots. Free try then prepaid TEST. https://pdf.kymac.co

12 tools answering

image-ocr

by kymac-ocr

Image URL → plain text OCR for bots. Free try then prepaid TEST. https://ocr.kymac.co

12 tools answering

feed-digest

by kymac-feeds

RSS/Atom URL → structured items for bots. Free try then prepaid TEST. https://feeds.kymac.co

12 tools answering

WebhookTest.net

by webhooktest

Anonymous webhook capture, inspection, waiting, and response configuration for AI agents.

8 tools answering

Otterkit

by useotterkit

Tunnels and webhooks for AI agents: capture, await, verify, replay, and send signed test events.

117 installs/wk local only

MailFixture

by mailfixture

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.

answering

Pagent

by aihumin

Hosted MCP for Pagent: review Bayesian A/B tests, capture hypotheses, manage websites via OAuth.

answering

shelf-smoke — url smoke / headless QA

by kymac-shelf

url smoke / headless QA: desktop+phone → pass/fail JSON. MCP shelf.kymac.co

12 tools answering

webhook-inbox — questions

Answers built from our own checks of this server.

What can webhook-inbox do?

It exposes 15 tools, read directly from the server on our last check. Among them: capture_inbox, checkout_credits, confirm_credits, credit_balance, credit_events, health and 9 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is webhook-inbox mostly used for?

Its tools cluster around credit and revoke. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is webhook-inbox working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 83 of 83 checks got a reply (100.0%), average response time 455 ms. The bar chart above shows every period we have measured.

How do I connect webhook-inbox?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does webhook-inbox need an API key?

No. webhook-inbox completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 15 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is webhook-inbox?

It answers our handshake in 455 ms on average, which is faster than 32% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.