x402 toolkit for AI agents: paid web, AI, and Base chain tools per call in USDC. Free tools too.
| Endpoint | https://quartermaster.surewhynot.app/mcp (streamable-http) |
|---|---|
| Registry version | 1.6.0 |
| Now | 49 tools · grade C (75) · pin ts_ffccd7b1019b5b4c71eed2f0de8a05ab · protocol 2025-06-18 |
| First / last listed | 2026-10-30 02:43 UTC / 2026-10-30 02:43 UTC |
| Grade over time | 2026-10-30: C (75), 49 tools |
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Tools: x402_router web_extract page_meta qr_generate dns_lookup http_error_explain tx_status wallet_balance gas_prices summarize_url translate_text tldr_text classify_text unshorten_url regex_test random_numbers random_pick http_check public_holiday x402_inspect x402_simulate tx_decode embed_text extract_structured moderate_text describe_image token_price payment_receipt resolve_basename x402_audit payment_proof settlement_assurance x402_discover x402_merchant usdc_normalize base_token_info base_allowance base_contract base_usdc_transfers jwt_decode base64 text_stats text_diff x402_test_vector current_time generate_uuid hash_string http_errors_list quartermaster_info
x402_router | 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 params: q* |
web_extract | [Web] Extract clean readable text and metadata from a public webpage as structured JSON. Costs $0.005 (USDC via x402). params: url* |
page_meta | [Web] Get page metadata: title, description, Open Graph, canonical URL, favicon, language. Costs $0.002. params: url* |
qr_generate | [Web] Generate a QR code as SVG (or terminal text with format=text). Costs $0.002. params: data*, format, ecc |
dns_lookup | [Web] Resolve DNS records over DNS-over-HTTPS (A, AAAA, CNAME, MX, NS, TXT, and more). Costs $0.001. params: name*, type |
http_error_explain | [Web] Explain an HTTP status code: meaning, common causes, fixes, retry guidance. Costs $0.001. params: code* |
tx_status | [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. params: hash* |
wallet_balance | [Crypto/Base] ETH and USDC (or any ERC-20) balance for an address on Base. Costs $0.001. params: address*, token |
gas_prices | [Crypto/Base] Current Base gas prices with a simple-transfer cost estimate. Costs $0.001. params: none |
summarize_url | [AI] AI summary of a public webpage (fetch + extract + summarize). length: short|medium|long. Costs $0.01. params: url*, length |
translate_text | [AI] AI translation into any target language; source auto-detected. Costs $0.005. params: text*, to* |
tldr_text | [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. params: text*, length |
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. Costs $0.002. params: text*, labels* |
unshorten_url | [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. params: url* |
regex_test | [Dev] Test a regular expression against text; returns every match with numbered and named capture groups. Deterministic. Costs $0.001. params: pattern*, text*, flags |
random_numbers | [Dev] Cryptographically-secure random integers in a range (CSPRNG, unbiased) — real entropy an LLM cannot produce itself. Costs $0.001. params: min, max, count |
random_pick | [Dev] Pick one or several options at random from a caller-supplied list (CSPRNG), optionally without replacement. Costs $0.001. params: options*, count, unique |
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. Costs $0.001. Use before relying on a dependency. params: url* |
public_holiday | [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. params: country*, date |
x402_inspect | [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. params: url* |
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 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. params: url*, address |
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 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. params: hash* |
embed_text | [AI] Text embeddings (1024-dim vector) for semantic search and RAG. Costs $0.002. params: text* |
extract_structured | Structured extraction: JSON Schema plus a URL or raw text in, matching JSON out. Costs $0.005. params: schema*, url, text |
moderate_text | [AI] Content-safety classification (Llama Guard): safe flag plus category codes. Costs $0.002. params: text* |
describe_image | [AI] AI vision: describe a public image URL, including visible text. Costs $0.005. params: url*, prompt |
token_price | [Crypto/Base] USD price for major tokens by symbol or any Base ERC-20 by address. Costs $0.001. params: token* |
payment_receipt | [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. params: hash* |
resolve_basename | Resolve a Basename (.base.eth) to a wallet address on Base. Costs $0.001. params: name* |
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 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 transacti params: url* |
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 - 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). params: hash*, payTo, amount |
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 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 params: hash*, payTo, amount, resource |
x402_discover | [x402] Search the Coinbase x402 Bazaar for paid resources by natural-language query. Costs $0.001. params: query*, limit |
x402_merchant | [x402] List all x402 Bazaar resources under a merchant payTo wallet. Costs $0.001. params: payTo*, limit |
usdc_normalize | Convert USDC amounts between atomic units and human decimals. Costs $0.001. params: amount*, decimals, direction |
base_token_info | ERC-20 name, symbol, decimals, total supply for a token on Base. Costs $0.001. params: address* |
base_allowance | Check an ERC-20 spending allowance on Base; flags unlimited approvals. Costs $0.001. params: owner*, spender*, token |
base_contract | Determine whether a Base address is a contract or an EOA. Costs $0.001. params: address* |
base_usdc_transfers | Recent USDC transfers (in and out) for an address on Base. Costs $0.002. params: address*, limit |
jwt_decode | [Dev] Decode a JWT header and payload (signature NOT verified). Costs $0.001. params: token* |
base64 | [Dev] Base64 encode or decode a string. Costs $0.001. params: op, data* |
text_stats | [Dev] Word/sentence counts, reading time, and readability score for text. Costs $0.001. params: text* |
text_diff | [Dev] Compact line-level diff between two texts. Costs $0.001. params: before*, after* |
x402_test_vector | [x402] Free: example x402 payment-requirement objects with field explanations. params: none |
current_time | FREE (no wallet needed): current time as ISO, unix, UTC, and optional local time for an IANA timezone. params: tz |
generate_uuid | FREE (no wallet needed): generate UUID v4 values, up to 100 at once. params: count |
hash_string | FREE (no wallet needed): SHA-1/256/384/512 hex digest of a string. params: data*, algo |
http_errors_list | FREE (no wallet needed): index of documented HTTP status codes (use http_error_explain for a paid detailed explanation). params: none |
quartermaster_info | Free: catalog, prices, and payment instructions for this server. params: none |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.