chain-analyzer.com
Cheap connectivity-check endpoint. Verifies the full x402 settlement path (signature -> CDP facilitator -> on-chain transferWithAuthorization) for $0.01 so AI agents can validate wallet + network + facilitator wiring before committing to higher-value AML calls.
$0.01 USDC
keyronne.com
Current USD prices for any crypto asset: majors by ticker (BTC, ETH, SOL), anything else by CoinGecko id or chain + contract address — so long-tail meme tokens work too. Up to 25 assets per call with per-asset confidence scores and timestamps. Crypto only; no equities or ETFs. POST a JSON body like: {"symbols":["BTC","ETH","pepe"]}
$0.003000 USDC
madoromi.fun
Japanese dream-interpretation agent API. Returns a Gemini-generated full interpretation from madoromi's curated dream-motif knowledge base (result schema agent-dream-insight.full.v1). Japanese output only. Dream text is never stored or logged. Async by default: the paid POST returns a job id in seconds; fetch the result with a plain free HTTP GET (no x402 client) at /api/agent/interpret/result/{job_id} (ready in ~15s). options.sync=true for one sync response (10-20s; client timeout 60s+).
$0.01 USDC
agent-ready.dev
Pay-per-scan AI agent-readability scan. POST { "url": "https://…" } with an X-PAYMENT header to run a scan with no account or subscription. Two tiers: $0.02 (25 pages) and $0.25 (250 pages), USDC on Base.
$0.02 USDC
context-relay.contextrelay.workers.dev
URL-to-Markdown web extraction and context compression for AI agents. Fetch a public web page and return clean, task-relevant, citation-verifiable LLM context with exact excerpts, locators, hashes, and estimated tokens saved. Use before an agent summarizes, answers questions from, or cites a long or noisy URL. Deterministic and model-free. Public HTML only; no PDFs, logins, or JavaScript-only pages.
$0.005000 USDC
keyronne.com
Resolve DNS records over DNS-over-HTTPS: A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR and more. Returns parsed answers with TTLs and the response status. Built for agents checking mail routing, domain config, or propagation. POST a JSON body like: {"name":"example.com","type":"MX"}
$0.002000 USDC
sendcheck-x402.pennyforge.workers.dev
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}
$0.01 USDC
gaming.halowerk.com
Evaluates caller-supplied telemetry samples against declared reaction-time, actions-per-second, movement-speed, and impossible-event rules. Flags are review signals only; the service does not identify software, inspect a device, establish intent, or justify an automatic ban.
$0.004000 USDC
webtools402.176-109-107-191.sslip.io
Validate and classify an email DOMAIN from public DNS: MX hosts + mail-provider, SPF and DMARC policy, plus disposable / free-webmail / role-account flags and a deliverability signal. No SMTP probing of individual mailboxes (privacy + ToS).
$0.005000 USDC
x402-solvers.onrender.com
Detect whether an arbitrage opportunity exists in a set of token exchange rates (multi-pool negative-cycle scan). Cheap boolean + magnitude signal for trading agents. POST a swap-rate graph, get back whether a profitable cycle exists and how large — without the path.
$0.001000 USDC
app.tenna.ai
Launcher Classification. Robinhood-chain tokens only. Which launch system created this pool, and on what basis. Distinguishes WETH-paired meme launchpads from VIRTUAL-paired launchers. Never claims a launcher is an official Virtuals system without independent verification.
$0.10 USDC
vibesprings.net
Real-time gas price oracle for multiple EVM chains. Returns slow/standard/fast fee estimates, estimated transaction costs (ETH transfers, ERC-20 transfers, swaps), and network congestion status. Supports Base, Ethereum, Arbitrum, and Optimism.
$0.001000 USDC
x402.charliemorrison.dev
GitHub repo discoverability & SEO audit: scores a repo's README, description, topics, homepage and metadata and returns a 0-100 score, a grade, and fixes. Input: owner, repo.
$0.005000 USDC
trust-agent.io
OFAC sanctions list updates as a feed: every SDN designation and delisting of an EVM crypto address since a timestamp you supply, with the listing reason and when it was recorded. No address list to send; match it against your own counterparty book locally, so the service never learns which addresses are yours. Poll it and pass the returned checkedAt back as since. Free: GET /v1/watch. Trial: /v1/trial.
$0.002003 USDC
squeezeos-api.onrender.com
Stock news headline API. Get the latest available market headline for a ticker symbol from a live data provider.
$0.001000 USDC
api.eckari.com
Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, carrier check digits and UPU S10 structure - returning the carrier, how distinctive the match is, every ranked candidate with typed evidence, and the parsed S10 details. No upstream call and no carrier account required. Use when: Which carrier is this tracking number from?
$0.001000 USDC
audit.152-53-82-29.sslip.io
Check Python packages from PyPI before you pip install or bump versions. Send {"packages":["requests==2.25.0","flask>=2.0"]} or {"requirements":"<requirements.txt text>"}, up to 50 packages. Per package: latest release and date, whether a pinned version is behind, license, yanked status, requires_python, and known vulnerabilities from OSV with severity and first fixed version. Deterministic, no LLM.
$0.005000 USDC
sendcheck-x402.pennyforgeorg.workers.dev
SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}
$0.01 USDC