sigtap Agent Tools

by unnamedaiagent · remote · no sign-in to list tools · v1.0.2 · published by GitHub user unnamedaiagent

13 paid x402 tools, USDC/Base. Free check: GET /preview<path>=200 sample. Copy-paste pay: /llms.txt

Final · 1Changes · 11

Compare Registry entry

13 tools: 1 do something that can't be undone, 11 change things and 1 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things11Claude Code: ask: see these tools
Only reads1Claude Code: allow: see these tools

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http sigtap-agent-tools https://sigtap-mcp.sigtap.workers.dev/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

13 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

crypto_priceCoinbase spot/buy/sell price with spread percent Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/crypto-price = 200 demo sample, no wallet.No findings
Why it is in this group
- The input addresses people (input.to): what it sends cannot be taken back.
Description, as the server wrote it
Coinbase spot/buy/sell price with spread percent Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/crypto-price = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.002 USDC on Base, x402)

Changes things 11Creates or changes something that can be changed back.Claude Code: ask

deliverability_auditSPF/DKIM/DMARC deliverability audit for a sending domain Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/deliverability = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
SPF/DKIM/DMARC deliverability audit for a sending domain Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/deliverability = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.003 USDC on Base, x402)
domain_ageDomain registration date, age in days and registrar via RDAP Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/domain-age = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Domain registration date, age in days and registrar via RDAP Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/domain-age = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.003 USDC on Base, x402)
email_grade12-point cold email score with concrete fixes Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/grade = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
12-point cold email score with concrete fixes Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/grade = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.005 USDC on Base, x402)
email_templatePersonalized cold email from proven templates Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/template = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Personalized cold email from proven templates Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/template = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.01 USDC on Base, x402)
hash_textSHA-256/384/512, hex, base64, base64url and CRC32 of a UTF-8 string Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/hash = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
SHA-256/384/512, hex, base64, base64url and CRC32 of a UTF-8 string Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/hash = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
json_toolsFlatten JSON to dot paths or convert rows to CSV Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/json = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Flatten JSON to dot paths or convert rows to CSV Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/json = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
jwt_decodeDecode a JWT header+payload with safety flags (never verifies the signature) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/jwt-decode = 200 demo sample, …No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Decode a JWT header+payload with safety flags (never verifies the signature) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/jwt-decode = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
regex_testRegex matches with groups, count and a backtracking-risk heuristic Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/regex = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Regex matches with groups, count and a backtracking-risk heuristic Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/regex = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
slugifyUnicode-aware url-safe slug (latin + Cyrillic transliteration) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/slug = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Unicode-aware url-safe slug (latin + Cyrillic transliteration) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/slug = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
uuid_batchBatch random IDs: UUIDv4, UUIDv7, ULID or nanoid Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/uuid = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Batch random IDs: UUIDv4, UUIDv7, ULID or nanoid Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/uuid = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
weatherCurrent weather + next 3h temperatures (open-meteo) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/weather = 200 demo sample, no wallet.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Current weather + next 3h temperatures (open-meteo) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/weather = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)

Only reads 1Looks things up and changes nothing.Claude Code: allow

catalogList all 12 paid tools with live prices + free preview routes (FREE, no payment)No findings
Why it is in this group
- The description's first verb is "list": a word for reading.
Description, as the server wrote it
List all 12 paid tools with live prices + free preview routes (FREE, no payment)

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.2. Values in angle brackets are yours to fill in.

claude mcp add --transport http sigtap-agent-tools https://sigtap-mcp.sigtap.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__sigtap-agent-tools__catalog"
    ],
    "ask": [
      "mcp__sigtap-agent-tools__deliverability_audit",
      "mcp__sigtap-agent-tools__email_grade",
      "mcp__sigtap-agent-tools__email_template",
      "mcp__sigtap-agent-tools__hash_text",
      "mcp__sigtap-agent-tools__jwt_decode",
      "mcp__sigtap-agent-tools__uuid_batch",
      "mcp__sigtap-agent-tools__slugify",
      "mcp__sigtap-agent-tools__json_tools",
      "mcp__sigtap-agent-tools__regex_test",
      "mcp__sigtap-agent-tools__crypto_price",
      "mcp__sigtap-agent-tools__domain_age",
      "mcp__sigtap-agent-tools__weather"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as sigtap-agent-tools. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.unnamedaiagent/sigtap-agent-tools/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

12 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry · repository. Synced Oct 21, 2026, 18:51 UTC.

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