All projects on Base matching “dev”

Verify a claim or fact check a statement against public web sources: send a question and up to 5 URLs, get cited evidence - passages that support, contradict or fail to settle it. Claim verification with a citation for every excerpt: source URL, retrieval time, content hash. Never charges when nothing is retrieved. Free to evaluate: the `sample` tool returns one real response at no cost, so you ca

Free during launch. Independent verification of AI agent output before you pay: an invoice or deliverable against your JSON Schema and rules. Pass/fail, % passed, fix hints, signed attestation and receipt. $0.02 USDC after, no signup, x402 v2.

Call before paying an unfamiliar x402 endpoint, or to pick between providers. $0.02, usually <1 s plus one probe: live unpaid probe (status, latency, TLS, PAYMENT-REQUIRED decoded and sanity-checked), seller reputation from indexed on-chain USDC payments to its Base payTo (24 h/7 d count, distinct payers, total and median USD, top-payer share), Bazaar listing and price, and a looks legit/caution/a

OpenAI-compatible chat completions backed by DeepSeek (GET probe variant). Answers open-ended questions and returns reasoned analysis.

Daily smart-money brief for ETH/Base/Solana: 24h net asset changes across monitored onchain addresses with smart-money interpretation. Use when an agent needs an onchain whale/flow summary for a trading day. Pay $0.05 USDC per call on Base mainnet.

Filter a JSON/NDJSON event log by field/operator/time range; returns matching events. Use when an agent needs to pull matching rows (thresholds, equality, substring, threshold crossings, time windows) out of a log or metrics event list. Body: {events:[...]|"<ndjson>", filter:{field,op,value?,direction?,timeField?,from?,to?,limit?}}. Ops: gt,gte,lt,lte,eq,ne,contains,crosses_threshold. Free demo at

Assess the trustworthiness of a domain: RDAP registration age and registrar, DNS records (A/MX/TXT-SPF), and HTTPS reachability. Returns a 0-100 trust score with signals and an audit receipt.

Base wallet lookup / address research API: ETH + USDC balance with USD value (CoinGecko/Coinbase quotes), EOA or smart contract, nonce (tx count), gas base fee, ERC-20 token holdings and recent USDC inflows/outflows with counterparty count for any Base mainnet address. Wallet analytics, portfolio and onchain due diligence for agents. Live public RPC reads at request time; pay per call with x402 US

Base token risk check before a swap: send a token contract address, get ok / caution / avoid with reasons. Reads the contract (ERC-20 metadata, owner, upgradeable proxy, mint / pause / blacklist / fee selectors in bytecode) and its DEX liquidity (Uniswap + Aerodrome pools, read on-chain). Deterministic, no LLM.

Check an AI agent's track record: signed verification history, pass/fail counts, recency-weighted score. $0.01 per lookup when there is a score; a lookup for an AI agent with no history is answered free, signed. USDC via x402 v2 (Base/Solana).

Florida condo SIRS filing check: has a Florida condominium association reported a completed Structural Integrity Reserve Study to the state (DBPR)? Search by building or association name, optionally narrowed by city, zip or county.

Perform the chant: 'All hail the Magic Conch!' The club responds: 'Hooray for the magic conches!' That is all this does, and it is enough.

NoJunk Speech transcribe: Transcribe audio (URL or base64, up to 20 MB / about 10 minutes) to text with timestamps, word count and detected language (Whisper large-v3-turbo).

Verify whether a cited source supports an exact factual claim

Markdown only: fetch a public web page (robots.txt respected) and return clean Markdown plus title/word count. Cheaper than /v1/extract when you do not need structured product/table JSON.

Nationwide interstate and long-distance household moves between any two US states, plus local moves in the DC/Maryland/Virginia area. Licensed carrier USDOT 3764697, MC 1341637. Indicative price per tariff (not a legal estimate) between any two US ZIP codes, per cubic foot by distance and size. Local hourly: DC, MD, VA only. Hands off to a free survey and written estimate. 400 on invalid input (no

Find the cheapest WORKING x402 service for a task. Compares thousands of paid APIs from the Coinbase, PayAI and Dexter catalogs by similarity, live price, uptime and speed (checked continuously). Send the header "X-Free-Tier: 1" for 20 free requests per day. /v1/check is always free.

Deterministic pre-purchase readiness and payment-metadata audit for public agent endpoints

Pay-per-call cited research brief. The request carries a query and 1 to 12 quotes with source URLs; the response is a short brief that cites only those quotes, at 0.008 USDC per call on Base. Payment settles after the brief is produced. A client nonce header makes a retry free of a second charge.

Full Hyperliquid funding extremes (carry-cost leaderboard)

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.

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 page

Search Ticketmaster events by keyword, date, location, venue, attraction, or classification

Withdraw agent ETH balance to USDC (mutates: gas + swap)

Lists entities publicly flagged as non-compliant under MiCA by EU national competent authorities. Query parameter: country (string, optional; 2-letter EU member-state code, e.g. IT). JSON response: count (number) and entities[] with legal_name, commercial_name, lei, home_member_state, competent_authority, website, infringement, reason, decision_date (ISO date), record_updated. Data source: ESMA In

Use when you need to check whether an IBAN is valid and extract its country, bank code and check digits.

Check whether a drug is currently in shortage in the FDA Drug Shortages Database, by generic/brand name or NDC. Returns the FDA status (Currently in Shortage / Resolved / To Be Discontinued), affected presentations, availability, FDA-published shortage reason, and posting dates. Public-domain FDA data via openFDA.

Bridge condition and clearance verdict from the FHWA National Bridge Inventory: component condition ratings (deck/superstructure/substructure/culvert, 0-9), Good/Fair/Poor verdict, scour-critical flag, vertical/horizontal clearances, ADT, and inspection date for any US bridge by structure number, state+county, or facility/feature text. Public-domain USDOT data.

Fetch a URL and return clean, token-efficient markdown

Use when you need what is said in a public short-form video (TikTok, Instagram Reel, YouTube Short, Facebook), max 180s. Returns timestamped transcript, English translation if foreign, detected languages. Async: returns job_id + token, poll result_url. Charged only on delivery; failures cost nothing. Repeat videos return instantly.