Every agent-payable API.

True cost of trading xyz:TSLA on Hyperliquid, measured on Vaunt's own IOC taker orders: slippage vs mid (p50/p90 bps), taker fee paid, wall-clock to fill, fill rate, against the venue-class median, plus spread, round-trip cost, depth within 1% and funding APR. Real fills, not quotes.

YAML to JSON. Convert a YAML document (config files, Kubernetes manifests, OpenAPI specs, front matter) into JSON, parsed by the yaml library with anchors and aliases resolved (alias expansion capped against billion-laughs documents) and duplicate keys refused. Up to 100 KB. Use before feeding YAML into a JSON-only tool or schema check; for the reverse use json_to_yaml. Invalid YAML is a 400 with the parser's message, uncharged.

A fair random yes or no, with a cryptographic random source. For quick decisions when the options are equally good. Use to break ties.

YGOPRODeck Yu-Gi-Oh card lookup (keyless). POST {name|fname|id}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose scryfall-cards. Response trimmed (no full card_sets dump).

Ranked DeFi yield pools from DefiLlama (TVL >= $10M, prefer stablecoin/single-asset)

US Treasury par yield curve (1mo to 30yr, percent) for one date, or the latest if omitted. Weekend or holiday dates return the nearest prior business day with a note. Data from U.S. Treasury; not financial advice.

U.S. Treasury yield curve: the latest daily yields from 1 month to 30 years, the 10Y-2Y and 10Y-3M spreads, inversion flags (a closely watched recession signal) and changes vs. the previous day, a month and a year ago. Data, not investment advice.

Yield farming opportunities on Base: liquidity pools, concentrated liquidity (Aerodrome Slipstream) and auto-compounding vaults, ranked risk-adjusted, with quoted APY split into fees and token rewards, the sustainable APY once incentives fade, TVL, a risk score, and realized APY where measured. Useful for picking farms worth their risk. Ids work with every other route. 404 for unknown paths and 400 for invalid arguments, before any payment; 503 while data refreshes; charged only for a 200.

Compounds supplied rent and expense growth assumptions, applies vacancy and collection loss, subtracts operating expenses and capital reserve, and divides net operating income by a caller-supplied property value. This is scenario arithmetic, not a valuation, market forecast, investment recommendation, tax calculation or guarantee of income.

Yield pool safety: peg of every underlying asset, yield sustainability, emission dependence, exit depth

0-100 safety score with components (protocol trust, TVL depth, audits, track record), observed and risk-adjusted APR, and whether STB's Auto-Defense would exit — for every vetted stablecoin vault, or one by ?venue=<id|pool address>.

Top DeFi yield opportunities per chain from DefiLlama — TVL-filtered, outlier-cleaned (unsustainable meme-pool APYs removed), sorted by APY. Fields: project, symbol, apy_pct, apy_base_pct, tvl_usd, stable. Ideal for yield-hunting agents.

Find the best DeFi yields across 500+ protocols and all major chains: filter by token (USDC, ETH...), chain, protocol, stablecoin-only and minimum TVL; returns APY (base + reward), 30-day mean APY, 7-day change, TVL, impermanent-loss risk and outlook. Sort by APY or TVL.

Best DeFi yields (APY) across lending/liquidity pools, highest first, source DefiLlama. Optional parameters: ?chain=<slug> (e.g. base), ?min_tvl=<usd> (minimum pool TVL), ?limit=<n> (default 20, max 100).

Ranked DeFi yields filtered by asset, chain, min TVL, stablecoin-only or single-sided, with a risk-adjusted APY and risk flags per pool (APY spike, reward-heavy, impermanent loss, low TVL, multi-asset exposure).

Search every tracked DeFi yield pool with TVL over $50k: filter by chain, project, token symbol, stablecoin-only and minimum TVL, ranked by APY with base/reward split and IL risk. Open DefiLlama data, refreshed server-side every 15 minutes. $0.002 per query — the yield screener as a pay-per-call primitive.

You.com Finance Research API: agentic deep research on a financial question, returning a synthesized answer with cited sources. Use when an agent needs well-reasoned market or company analysis for a trading or investment decision. JSON body: input (required question), research_effort (standard | deep | exhaustive, default deep). Paid per call in USDC. Async: paying returns a jobId; poll the SIWX-authed poll_url for the result (deep research takes 1-3 min).

You.com Search API: real-time web search returning ranked results grouped by section (results.web, results.news), each with url, title and description; web results also carry snippets. Use when an agent needs fresh, citable web data (news, markets, company facts) to ground a decision. Query params: query (required), count 1-100 (default 10), livecrawl (web|news|all; fetches live page contents, charged per result), country, freshness. Paid per call in USDC.

Scrape YouTube videos from searches, channels or URLs with full details: exact likes, views, comment count, publish date, duration, channel and subscribers, description, hashtags, keywords, caption languages, optional transcript. No API key, no login. One search per call (result caps in the input schema); failed lookups are not charged.

Scrape YouTube search results for any keyword: videos (title, channel, views, publish date, duration, description snippet, thumbnail, position) or channels (subscribers, description). Any language and country. No API key, no quota. One search per call (result caps in the input schema); failed lookups are not charged.

YouTube transcript: full captions/subtitles for one video as clean plain text plus timestamped segments, title, channel, duration and language, with language fallback and translation. Charged only on success.

YouTube Transcript & Captions: the caption transcript of one YouTube video by id or URL (watch, shorts, live, youtu.be): the full text plus timed segments with start and end in milliseconds and the caption language. Video to text for summaries and research. A video without captions is not charged. Bad input is free; not found or no match is not charged.

Full transcript of any YouTube video by video id or URL: captions/subtitles as clean plain text plus timestamped segments, the video's chapter markers, and every caption track it offers so an agent can pick a language and re-fetch. YouTube transcript, video to text, captions extraction, subtitle download, closed captions, speech to text, multilingual, asr and authored tracks. No API key.

Get YouTube video transcripts (captions) with timestamps by video URL, for a channel's latest videos or for search results: full text, segments, language (human or auto), translation, plus title, channel, views, duration. No API key, no login. One search per call (result caps in the input schema); failed lookups are not charged.

YouTube Video Comments: the public comments on one YouTube video by id or URL. Per comment the text, author channel handle, verification, likes, reply count, time and link in the shared social schema; next_cursor gives the next page. Audience feedback and sentiment research. Bad input is free; not found or no match is not charged.

Prepaid credits for the YourAITools agent APIs: one x402 payment of $0.005 USDC mints an API key holding $0.005 of credits. Send it as Authorization: Bearer <key> to PayGuard, TokenVerdict, SignCheck, WebRead, InjectScan, DomainCheck, PkgGuard, StackDetect or AgentGate paid routes; each call debits its normal price instead of an on-chain payment. Key shown once. Prepaid API usage only, not refundable.

Prepaid API credits (sample pack). Prepaid credits for the YourAITools agent APIs: one x402 payment of $0.005 USDC mints an API key holding $0.005 of credits. Send it as Authorization: Bearer <key> to PayGuard, TokenVerdict, SignCheck, WebRead, InjectScan, DomainCheck, PkgGuard, StackDetect or AgentGate paid routes; each call debits its normal price instead of an on-chain payment. Key shown once. Prepaid API usage only, not refundable.

Top up an existing YourAITools credits key: one x402 payment of $5 USDC adds $5.50 of credits ($0.50 bonus). Send the key as Authorization: Bearer <key>. Prepaid API usage only, not refundable.

Top up an existing YourAITools credits key: one x402 payment of $1 USDC adds $1.00 of credits. Send the key as Authorization: Bearer <key>. Prepaid API usage only, not refundable.

Prepaid API credits ($1 pack). Prepaid credits for the YourAITools agent APIs: one x402 payment of $1 USDC mints an API key holding $1.00 of credits. Send it as Authorization: Bearer <key> to PayGuard, TokenVerdict, SignCheck, WebRead, InjectScan, DomainCheck, PkgGuard, StackDetect or AgentGate paid routes; each call debits its normal price instead of an on-chain payment. Key shown once. Prepaid API usage only, not refundable.

Prepaid API credits ($5 pack with bonus). Prepaid credits for the YourAITools agent APIs: one x402 payment of $5 USDC mints an API key holding $5.50 of credits ($0.50 bonus). Send it as Authorization: Bearer <key> to PayGuard, TokenVerdict, SignCheck, WebRead, InjectScan, DomainCheck, PkgGuard, StackDetect or AgentGate paid routes; each call debits its normal price instead of an on-chain payment. Key shown once. Prepaid API usage only, not refundable.

Featured paid placement for an AI tool in a directory, 30 days. YourAITools listing (29.00 USDC): Featured on youraitools.co for 30 days after approval (review within 48h). POST JSON {tool_url,name,contact_email,category}; invalid bodies get 400 before payment. Reviewed for legitimacy and fit; payment does not guarantee approval. Rejected = refunded manually in USDC.

AI tool launch bundle with 24-hour review and 30 days of Featured paid placement. YourAITools listing (49.00 USDC): Launch: 24h review + 30 days Featured on youraitools.co + a newsletter line once it has subscribers. Reviewed for legitimacy and fit; payment does not guarantee approval. Rejected = refunded manually in USDC.

AI tool directory submission with 24-hour review. YourAITools listing (19.00 USDC): fast-track review of your AI tool within 24h, published on youraitools.co if approved. POST JSON {tool_url,name,contact_email,category}; invalid bodies get 400 before payment. Reviewed for legitimacy and fit; payment does not guarantee approval. Rejected = refunded manually in USDC.

YouTube channel videos: the latest 15 videos for a channel (URL, @handle or UC… id) with titles, publication dates, view and like counts. GET ?id=

YouTube search: up to 20 results with title, channel, views, publish age and thumbnails. GET ?q=<query>&limit=<1-20>&filter=<video|channel>

YouTube Shorts automation with AI: queue → render → upload → notify. A 3x/day pipeline that takes product photos from Google Drive, renders a 720x1280 Shorts video with Ken Burns motion, uploads it to YouTube via the Data API v3, updates a static showcase page and reports to Telegram. Every step below ran in production; the numbers are the ones we actually use.

YouTube transcript: full caption text of any video with timestamps, per-segment or plainText, en default, manual or auto (21+ languages), keyless. GET ?url=<video-url>&lang=<code>

YouTube video metadata: title, channel, view count, length, description and thumbnail for any video URL or id. GET ?url=

Year-on-year growth in point-of-sale sales and units for one of ~380 US consumer companies, by ISIN or ticker, for $0.01: the company's latest reported quarter (91 days to its end) against the same weekdays a year earlier, per panel store and against the covered market (all companies with the same series together). From transactions at eight US retailers, not government aggregates or SEC filings. The daily series: /v1/companies/{id}/sales. Docs: https://api.decadata.io/llms.txt

Ysaere Agent SAM Registration Expiration — $0.02 USDC, no account needed. Input: {"target":"Costco Wholesale Corporation"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Shares Outstanding — $0.02 USDC, no account needed. Input: {"target":"COST"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Latest Proxy — $0.02 USDC, no account needed. Input: {"target":"COST"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Contract Liability — $0.02 USDC, no account needed. Input: {"target":"AAPL"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Depreciation — $0.02 USDC, no account needed. Input: {"target":"COST"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent NS-CMIC Screen — $0.02 USDC, no account needed. Input: {"target":"Acme Corp"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Intangible Assets — $0.02 USDC, no account needed. Input: {"target":"AAPL"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Diluted EPS — $0.02 USDC, no account needed. Input: {"target":"COST"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Total Assets — $0.02 USDC, no account needed. Input: {"target":"COST"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.

Ysaere Agent Share-Based Pay — $0.02 USDC, no account needed. Input: {"target":"COST"}. The answer is in this response. A missing answer is refused before payment. Wallet only. No account price.