app.surewhynot.quartermaster/quartermaster

by quartermaster.surewhynot.app · remote · no sign-in to list tools · v1.6.0 · published by app.surewhynot.quartermaster

x402 toolkit for AI agents: paid web, AI, and Base chain tools per call in USDC. Free tools too.

Final · 4Changes · 36

Compare Registry entry

49 tools: 4 do something that can't be undone, 36 change things and 9 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone4Claude Code: ask: see these tools
Changes things36Claude Code: ask: see these tools
Only reads9Claude 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 quartermaster https://quartermaster.surewhynot.app/mcp

Tools

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

49 tools

Can't be undone 4Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

base_usdc_transfersRecent USDC transfers (in and out) for an address on Base.No findings
Why it is in this group
- The name "base_usdc_transfers" says "transfer": a word for a change that another call does not undo.
Description, as the server wrote it
Recent USDC transfers (in and out) for an address on Base. Costs $0.002.
payment_proof[x402] Verify an x402 settlement on Base OR Solana from a tx id (0x hash or base58 signature): confirm it succeeded, decode its USDC transfers, optionally assert payTo/amount - ret…No findings
Why it is in this group
- The name "payment_proof" says "payment": a word that usually means money moves, which cannot be taken back.
Description, as the server wrote it
[x402] Verify an x402 settlement on Base OR Solana from a tx id (0x hash or base58 signature): confirm it succeeded, decode its USDC transfers, optionally assert payTo/amount - returns a single verdict. Costs $0.003. Choose this when you only need the yes/no did-it-land answer; use settlement_assurance for the full scored report (proof + receipt + optional endpoint audit).
payment_receipt[x402] Formatted settlement receipt for a Base transaction (0x hash) or Solana settlement (base58 signature): timestamp, decoded transfers, explorer link.No findings
Why it is in this group
- The name "payment_receipt" says "payment": a word that usually means money moves, which cannot be taken back.
Description, as the server wrote it
[x402] Formatted settlement receipt for a Base transaction (0x hash) or Solana settlement (base58 signature): timestamp, decoded transfers, explorer link. Costs $0.002. Choose this for a human-readable record; use payment_proof to ASSERT a specific payTo/amount, or settlement_assurance for a full scored verdict.
translate_text[AI] AI translation into any target language; source auto-detected.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
[AI] AI translation into any target language; source auto-detected. Costs $0.005.

Changes things 36Creates or changes something that can be changed back.Claude Code: ask

base_allowanceCheck an ERC-20 spending allowance on Base; flags unlimited approvals.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
Check an ERC-20 spending allowance on Base; flags unlimited approvals. Costs $0.001.
base_contractDetermine whether a Base address is a contract or an EOA.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
Determine whether a Base address is a contract or an EOA. Costs $0.001.
base_token_infoERC-20 name, symbol, decimals, total supply for a token on Base.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
ERC-20 name, symbol, decimals, total supply for a token on Base. Costs $0.001.
base64[Dev] Base64 encode or decode a string.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
[Dev] Base64 encode or decode a string. Costs $0.001.
classify_text[AI] Zero-shot classification of text into caller-supplied labels; the result is validated back into your label set so you can route on it.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
[AI] Zero-shot classification of text into caller-supplied labels; the result is validated back into your label set so you can route on it. Costs $0.002.
current_timeFREE (no wallet needed): current time as ISO, unix, UTC, and optional local time for an IANA timezone.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
FREE (no wallet needed): current time as ISO, unix, UTC, and optional local time for an IANA timezone.
embed_text[AI] Text embeddings (1024-dim vector) for semantic search and RAG.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
[AI] Text embeddings (1024-dim vector) for semantic search and RAG. Costs $0.002.
extract_structuredStructured extraction: JSON Schema plus a URL or raw text in, matching JSON out.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
Structured extraction: JSON Schema plus a URL or raw text in, matching JSON out. Costs $0.005.
gas_prices[Crypto/Base] Current Base gas prices with a simple-transfer cost estimate.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
[Crypto/Base] Current Base gas prices with a simple-transfer cost estimate. Costs $0.001.
generate_uuidFREE (no wallet needed): generate UUID v4 values, up to 100 at once.No findings
Why it is in this group
- The name "generate_uuid" says "generate": a word for a change.
Description, as the server wrote it
FREE (no wallet needed): generate UUID v4 values, up to 100 at once.
hash_stringFREE (no wallet needed): SHA-1/256/384/512 hex digest of a string.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
FREE (no wallet needed): SHA-1/256/384/512 hex digest of a string.
http_check[Web] Liveness/latency pre-flight for a URL: is it up, HTTP status and class, response latency in ms, whether it redirects and where, content-type and server.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
[Web] Liveness/latency pre-flight for a URL: is it up, HTTP status and class, response latency in ms, whether it redirects and where, content-type and server. Costs $0.001. Use before relying on a dependency.
jwt_decode[Dev] Decode a JWT header and payload (signature NOT verified).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
[Dev] Decode a JWT header and payload (signature NOT verified). Costs $0.001.
moderate_text[AI] Content-safety classification (Llama Guard): safe flag plus category codes.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
[AI] Content-safety classification (Llama Guard): safe flag plus category codes. Costs $0.002.
page_meta[Web] Get page metadata: title, description, Open Graph, canonical URL, favicon, language.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
[Web] Get page metadata: title, description, Open Graph, canonical URL, favicon, language. Costs $0.002.
public_holiday[Dev] Is a date a public holiday in a country (2-letter ISO code)?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
[Dev] Is a date a public holiday in a country (2-letter ISO code)? Returns the holiday name, its types, and the next upcoming holiday. Costs $0.001. Useful for scheduling.
qr_generate[Web] Generate a QR code as SVG (or terminal text with format=text).No findings
Why it is in this group
- The name "qr_generate" says "generate": a word for a change.
Description, as the server wrote it
[Web] Generate a QR code as SVG (or terminal text with format=text). Costs $0.002.
quartermaster_infoFree: catalog, prices, and payment instructions for this server.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
Free: catalog, prices, and payment instructions for this server.
random_numbers[Dev] Cryptographically-secure random integers in a range (CSPRNG, unbiased) — real entropy an LLM cannot produce itself.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
[Dev] Cryptographically-secure random integers in a range (CSPRNG, unbiased) — real entropy an LLM cannot produce itself. Costs $0.001.
random_pick[Dev] Pick one or several options at random from a caller-supplied list (CSPRNG), optionally without replacement.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
[Dev] Pick one or several options at random from a caller-supplied list (CSPRNG), optionally without replacement. Costs $0.001.
regex_test[Dev] Test a regular expression against text; returns every match with numbered and named capture groups.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
[Dev] Test a regular expression against text; returns every match with numbered and named capture groups. Deterministic. Costs $0.001.
settlement_assurance[x402] FLAGSHIP: from a tx id on Base (0x hash) or Solana (base58 signature), prove a completed x402 payment is real and sound - onchain success, USDC transfer match to an expected…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
[x402] FLAGSHIP: from a tx id on Base (0x hash) or Solana (base58 signature), prove a completed x402 payment is real and sound - onchain success, USDC transfer match to an expected wallet/amount, a receipt, and an optional audit of the issuing endpoint - as one 0-100 scored report with a verdict. Costs $0.03. This is the most complete post-payment check; use payment_proof if you only need a plain pass/fail, tx_status for raw status, or x402_audit to grade a seller endpoint by URL (no payment yet).
text_stats[Dev] Word/sentence counts, reading time, and readability score for text.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
[Dev] Word/sentence counts, reading time, and readability score for text. Costs $0.001.
tldr_text[AI] Summarize raw text you pass in directly (not a URL).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
[AI] Summarize raw text you pass in directly (not a URL). length: short|medium|long. Costs $0.005. Use summarize_url when you have a URL instead.
token_price[Crypto/Base] USD price for major tokens by symbol or any Base ERC-20 by address.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
[Crypto/Base] USD price for major tokens by symbol or any Base ERC-20 by address. Costs $0.001.
tx_decode[Crypto/Base] Decode a Base transaction's calldata into the function it called and its arguments — ERC-20 transfer/approve and the EIP-3009 transferWithAuthorization used by x402 s…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
[Crypto/Base] Decode a Base transaction's calldata into the function it called and its arguments — ERC-20 transfer/approve and the EIP-3009 transferWithAuthorization used by x402 settlements. Recognizes x402 settlement transactions and formats USDC amounts. Costs $0.003. Use tx_status for pass/fail; use this to see WHAT a transaction did.
unshorten_url[Web] Expand a shortened/redirecting URL: follow the redirect chain and return every hop plus the final destination.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
[Web] Expand a shortened/redirecting URL: follow the redirect chain and return every hop plus the final destination. Each hop is SSRF-validated. Costs $0.002. Safe way to see where an untrusted link goes.
usdc_normalizeConvert USDC amounts between atomic units and human decimals.No findings
Why it is in this group
- The description's first verb is "convert": a word for a change.
Description, as the server wrote it
Convert USDC amounts between atomic units and human decimals. Costs $0.001.
wallet_balance[Crypto/Base] ETH and USDC (or any ERC-20) balance for an address on Base.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
[Crypto/Base] ETH and USDC (or any ERC-20) balance for an address on Base. Costs $0.001.
web_extract[Web] Extract clean readable text and metadata from a public webpage as structured JSON.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
[Web] Extract clean readable text and metadata from a public webpage as structured JSON. Costs $0.005 (USDC via x402).
x402_audit[x402] WORKFLOW: full scored audit of an x402 SELLER endpoint (a URL) in one call - verifies the 402 challenge, payment fields, Bazaar discovery metadata, and the origin's discover…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
[x402] WORKFLOW: full scored audit of an x402 SELLER endpoint (a URL) in one call - verifies the 402 challenge, payment fields, Bazaar discovery metadata, and the origin's discovery surfaces; returns a 0-100 score, checks with evidence, and recommended fixes. Costs $0.01. Use this to grade an endpoint before trusting/publishing it; use settlement_assurance instead when you already have a transaction hash and want to prove a completed PAYMENT settled correctly.
x402_discover[x402] Search the Coinbase x402 Bazaar for paid resources by natural-language query.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
[x402] Search the Coinbase x402 Bazaar for paid resources by natural-language query. Costs $0.001.
x402_merchant[x402] List all x402 Bazaar resources under a merchant payTo 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
[x402] List all x402 Bazaar resources under a merchant payTo wallet. Costs $0.001.
x402_routerSTART HERE.No findings
Why it is in this group
- The description's first verb is "start": a word for a change.
Description, as the server wrote it
START HERE. One tool for anything x402, Base chain, or web/AI: describe your goal in plain English (q) and Quartermaster picks and runs the right underlying tool, returning the answer plus which tool it used. Examples: 'audit https://api.example.com/paid', 'price of eth', 'is 0x… a contract', 'verify settlement 0x…', 'search the bazaar for weather'. Use this when you don't want to choose among the individual tools below. Costs $0.03 (USDC via x402).
x402_simulate[x402] Pre-flight a payment BEFORE you spend: decode an endpoint's 402 challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with an optional payer add…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
[x402] Pre-flight a payment BEFORE you spend: decode an endpoint's 402 challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with an optional payer address — verify the wallet can afford the call on Base. Costs $0.003. Use this before paying an unfamiliar endpoint; use x402_inspect to lint an endpoint you own.
x402_test_vector[x402] Free: example x402 payment-requirement objects with field explanations.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
[x402] Free: example x402 payment-requirement objects with field explanations.

Only reads 9Looks things up and changes nothing.Claude Code: allow

describe_image[AI] AI vision: describe a public image URL, including visible text.No findings
Why it is in this group
- The name "describe_image" says "describe": a word for reading.
Description, as the server wrote it
[AI] AI vision: describe a public image URL, including visible text. Costs $0.005.
dns_lookup[Web] Resolve DNS records over DNS-over-HTTPS (A, AAAA, CNAME, MX, NS, TXT, and more).No findings
Why it is in this group
- The name "dns_lookup" says "lookup": a word for reading.
Description, as the server wrote it
[Web] Resolve DNS records over DNS-over-HTTPS (A, AAAA, CNAME, MX, NS, TXT, and more). Costs $0.001.
http_error_explain[Web] Explain an HTTP status code: meaning, common causes, fixes, retry guidance.No findings
Why it is in this group
- The name "http_error_explain" says "explain": a word for reading.
Description, as the server wrote it
[Web] Explain an HTTP status code: meaning, common causes, fixes, retry guidance. Costs $0.001.
http_errors_listFREE (no wallet needed): index of documented HTTP status codes (use http_error_explain for a paid detailed explanation).No findings
Why it is in this group
- The name "http_errors_list" says "list": a word for reading.
Description, as the server wrote it
FREE (no wallet needed): index of documented HTTP status codes (use http_error_explain for a paid detailed explanation).
resolve_basenameResolve a Basename (.base.eth) to a wallet address on Base.No findings
Why it is in this group
- The name "resolve_basename" says "resolve": a word for reading.
Description, as the server wrote it
Resolve a Basename (.base.eth) to a wallet address on Base. Costs $0.001.
summarize_url[AI] AI summary of a public webpage (fetch + extract + summarize).No findings
Why it is in this group
- The name "summarize_url" says "summarize": a word for reading.
Description, as the server wrote it
[AI] AI summary of a public webpage (fetch + extract + summarize). length: short|medium|long. Costs $0.01.
text_diff[Dev] Compact line-level diff between two texts.No findings
Why it is in this group
- The name "text_diff" says "diff": a word for reading.
Description, as the server wrote it
[Dev] Compact line-level diff between two texts. Costs $0.001.
tx_status[Crypto/Base] Check a Base transaction: success/reverted/pending, confirmations, gas, explorer link.No findings
Why it is in this group
- The name "tx_status" says "status": a word for reading.
Description, as the server wrote it
[Crypto/Base] Check a Base transaction: success/reverted/pending, confirmations, gas, explorer link. Costs $0.002. Choose this for a quick raw status; use payment_receipt for decoded transfers, or settlement_assurance to PROVE an x402 payment settled to the right wallet/amount.
x402_inspect[x402] Inspect and lint any x402 paid endpoint: decode the 402 challenge, identify network/asset, flag misconfigurations and Bazaar-readiness.No findings
Why it is in this group
- The name "x402_inspect" says "inspect": a word for reading.
Description, as the server wrote it
[x402] Inspect and lint any x402 paid endpoint: decode the 402 challenge, identify network/asset, flag misconfigurations and Bazaar-readiness. Costs $0.002. Choose this for a quick one-shot decode+lint; use x402_audit for a full 0-100 scored report with origin discovery probes and recommended fixes.

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 1.6.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http quartermaster https://quartermaster.surewhynot.app/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__quartermaster__dns_lookup",
      "mcp__quartermaster__http_error_explain",
      "mcp__quartermaster__tx_status",
      "mcp__quartermaster__summarize_url",
      "mcp__quartermaster__x402_inspect",
      "mcp__quartermaster__describe_image",
      "mcp__quartermaster__resolve_basename",
      "mcp__quartermaster__text_diff",
      "mcp__quartermaster__http_errors_list"
    ],
    "ask": [
      "mcp__quartermaster__x402_router",
      "mcp__quartermaster__web_extract",
      "mcp__quartermaster__page_meta",
      "mcp__quartermaster__qr_generate",
      "mcp__quartermaster__wallet_balance",
      "mcp__quartermaster__gas_prices",
      "mcp__quartermaster__translate_text",
      "mcp__quartermaster__tldr_text",
      "mcp__quartermaster__classify_text",
      "mcp__quartermaster__unshorten_url",
      "mcp__quartermaster__regex_test",
      "mcp__quartermaster__random_numbers",
      "mcp__quartermaster__random_pick",
      "mcp__quartermaster__http_check",
      "mcp__quartermaster__public_holiday",
      "mcp__quartermaster__x402_simulate",
      "mcp__quartermaster__tx_decode",
      "mcp__quartermaster__embed_text",
      "mcp__quartermaster__extract_structured",
      "mcp__quartermaster__moderate_text",
      "mcp__quartermaster__token_price",
      "mcp__quartermaster__payment_receipt",
      "mcp__quartermaster__x402_audit",
      "mcp__quartermaster__payment_proof",
      "mcp__quartermaster__settlement_assurance",
      "mcp__quartermaster__x402_discover",
      "mcp__quartermaster__x402_merchant",
      "mcp__quartermaster__usdc_normalize",
      "mcp__quartermaster__base_token_info",
      "mcp__quartermaster__base_allowance",
      "mcp__quartermaster__base_contract",
      "mcp__quartermaster__base_usdc_transfers",
      "mcp__quartermaster__jwt_decode",
      "mcp__quartermaster__base64",
      "mcp__quartermaster__text_stats",
      "mcp__quartermaster__x402_test_vector",
      "mcp__quartermaster__current_time",
      "mcp__quartermaster__generate_uuid",
      "mcp__quartermaster__hash_string",
      "mcp__quartermaster__quartermaster_info"
    ],
    "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 quartermaster. 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/app.surewhynot.quartermaster/quartermaster/changes.xml

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Source: MCP Registry. Synced Oct 21, 2026, 17:45 UTC.

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