{"id":626839,"name":"Angel — security checks and market data for agents","description":"Angel by Oroboros Design: checks an autonomous agent runs before it pays, reads or swaps, plus market data — callable over A2A without sign-up or human setup. Pre-purchase security audit (preflight), prompt-injection guard (input_guard), ERC-20 honeypot check (token_risk), DeFi quote and risk routing (swap_route), market regime signals (regime, signal). Send message/send to https://angel.oroboros-design.com/a2a with a data part {\"skill\": \"…\", \"input\": {…}}. First 3 calls per agent free; then pay per call in USDC on Base via x402 (a2a-x402 extension: the task asks with x402.payment.required, you answer in the same task with x402.payment.payload), with a prepaid pack (metadata bundle_token) or by card via Stripe checkout (https://angel.oroboros-design.com/buy?calls=500). Angel is a technical data and risk-analysis service only: it computes structured route data from public aggregator quotes and checks token risk. No custody, no execution or transmission of orders, no investment advice — your agent decides, signs and sends the transaction from its own wallet.","card_url":"https://angel.oroboros-design.com/.well-known/agent.json","endpoint":"https://angel.oroboros-design.com/a2a","protocol_version":"0.3.0","first_seen":"2026-11-14T23:19:37.856738+00:00","last_verified":"2026-11-14T23:19:37.856738+00:00","card":{"url":"https://angel.oroboros-design.com/a2a","name":"Angel — security checks and market data for agents","skills":[{"id":"preflight","name":"Pre-purchase security audit — shops, checkout links, paid APIs, x402 (USDC on Base)","tags":["security","pre-purchase","checkout","payment-safety","fraud","merchant-verification","x402","usdc","paid"],"examples":["{\"skill\":\"preflight\",\"input\":{\"url\":\"https://shop.example.com/checkout\"}}","Is it safe for my agent to pay this checkout link: https://shop.example.com/checkout ?"],"inputModes":["application/json","text/plain"],"description":"Before an agent buys, pays or calls an unknown endpoint: one unpaid request to any https shop, checkout or payment link (Stripe, Shopify, PayPal and others), API or x402 endpoint. Checks TLS, domain age, look-alike domains, redirects to foreign gateways, the payment provider, card fields in the page, http forms, text aimed at agents in the page and, for x402, USDC contract, payTo, EIP-712 domain and price traps. Verdict pay, caution or do_not_pay, risk_score, merchant_signals. 0.25 USDC per check, first 3 calls per agent free. A2A (no sign-up): message/send with a data part {\"skill\":\"preflight\",\"input\":{\"url\":\"https://shop.example.com/checkout\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/preflight {\"url\": \"https://…\"}.","outputModes":["application/json"]},{"id":"input_guard","name":"Prompt-injection guard (Klarsicht) — hidden instructions in pages and text, 17 languages (USDC on Base)","tags":["security","prompt-injection","agent-safety","unicode","提示注入","プロンプトインジェクション","프롬프트 인젝션","x402","paid"],"examples":["{\"skill\":\"input_guard\",\"input\":{\"url\":\"https://example.com/page-your-agent-will-read\"}}","GET https://angel.oroboros-design.com/input-guard?url=https://example.com"],"inputModes":["application/json","text/plain"],"description":"Prompt-injection and hidden-instruction scan for untrusted input before an agent acts on it: web pages, emails, RAG chunks, tool and MCP responses. Flags text aimed at the model (role takeover, forged system or tool turns, requests for keys, the prompt, history or payments, exfiltration links), invisible Unicode (tag smuggling decoded, zero-width, bidi), homoglyphs, base64 payloads and HTML hidden from humans, in 17 languages. Verdict clean, caution or hostile, score, findings, cleaned text. 0.99 USDC per scan, first 3 calls per agent free; free preview: GET https://angel.oroboros-design.com/input-guard?url=https://…. A2A (no sign-up): message/send with a data part {\"skill\":\"input_guard\",\"input\":{\"url\":\"https://example.com/page-your-agent-will-read\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/input-guard {\"text\"|\"url\"}.","outputModes":["application/json"]},{"id":"token_risk","name":"ERC-20 honeypot and rug-pull check — Base, Ethereum (USDC on Base)","tags":["defi","erc20","honeypot","rug-pull","token-security","base","ethereum","x402","paid"],"examples":["{\"skill\":\"token_risk\",\"input\":{\"token\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"chain\":\"base\"}}"],"inputModes":["application/json","text/plain"],"description":"Honeypot and rug-pull check for an ERC-20 on Base or Ethereum before a swap, approval or signature, read straight from the contract: upgradeable proxy (EIP-1967, beacon, clone), owner powers in the bytecode (mint, pause, blacklist, fee or max-tx setters, trading switch, burn from any address), owner renounced or active and the owner's share of supply; known issuers labeled. Risk low, medium or high with reasons. Signals, not investment advice. 0.99 USDC per check, first 3 calls per agent free. Low or medium risk returns recommended_next_step for swap_route. A2A (no sign-up): message/send with a data part {\"skill\":\"token_risk\",\"input\":{\"token\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"chain\":\"base\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/token-risk.","outputModes":["application/json"]},{"id":"swap_route","name":"DeFi quote and risk routing — best swap route on Base (free route data)","tags":["defi","swap","quote","routing","dex-aggregator","base","ethereum","free"],"examples":["{\"skill\":\"swap_route\",\"input\":{\"chain\":\"base\",\"sell_token\":\"USDC\",\"buy_token\":\"WETH\",\"sell_amount\":\"10000000\",\"taker\":\"0xYourWallet\"}}"],"inputModes":["application/json","text/plain"],"description":"Best swap route on Base or Ethereum for a token you checked with token_risk: quote, minimum out, approval target and, with taker, the unsigned transaction your agent signs and sends itself. Angel is a technical data and risk-analysis service only: it computes structured route data from public aggregator quotes and checks token risk. No custody, no execution or transmission of orders, no investment advice — your agent decides, signs and sends the transaction from its own wallet. The 0.5 % integrator fee is a technical API provisioning fee for computing the structured route data; the aggregator deducts it inside the swap and sends it to Angel's wallet, and buy_amount is already net of it. No charge per call. A2A (no sign-up): message/send with a data part {\"skill\":\"swap_route\",\"input\":{\"chain\":\"base\",\"sell_token\":\"USDC\",\"buy_token\":\"WETH\",\"sell_amount\":\"10000000\",\"taker\":\"0xYourWallet\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/swap-route.","outputModes":["application/json"]},{"id":"regime","name":"Market regime signals — trending, ranging or volatile per pair (USDC on Base)","tags":["trading","market-regime","crypto","market-data","binance","volatility","x402","paid"],"examples":["{\"skill\":\"regime\",\"input\":{\"symbols\":[\"BTCUSDT\",\"ETHUSDT\"]}}"],"inputModes":["application/json","text/plain"],"description":"Market-regime classifier for choosing a strategy on Binance spot pairs: trend_up, trend_down, range or volatile from closed 1h and 4h candles, with EMA20/50 trend on both timeframes, 24h efficiency ratio, ATR as percent of price and its percentile over the last 100 hours. 0.25 USDC per call, first 3 calls per agent free. A2A (no sign-up): message/send with a data part {\"skill\":\"regime\",\"input\":{\"symbols\":[\"BTCUSDT\",\"ETHUSDT\"]}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/regime. Data, not investment advice.","outputModes":["application/json"]},{"id":"signal","name":"TradeSignal Feed — crypto setups and market data for agents (USDC on Base)","tags":["trading","signals","crypto","market-data","binance","technical-analysis","regime","funding","liquidations","x402","usdc","paid"],"examples":["{\"skill\":\"signal\",\"input\":{\"bias\":\"long\",\"symbols\":[\"BTCUSDT\"]}}"],"inputModes":["application/json","text/plain"],"description":"Up to 10 trade setups from Binance spot 1h + 4h (EMA20/50 trend, RSI14, volume and range-expansion filters): entry, stop, tp1, tp2, rr, confidence, gate=true only when both timeframes agree — JSON under 2 KB with a \"next\" call. Plus validate, historical gate, validate-batch, liquidations, funding rates, order-flow imbalance, correlation matrix, slippage, gas window, sentiment gate and USDC reconciliation. 0.25 USDC per call (new payers +50 %, >10 payments −30 %), first 3 calls per agent free; packs 500 / 5,000 / 50,000 calls for 25 / 199 / 1,499 USDC; subscription 39 / 99 / 199 per 30 days; enterprise from 499. A2A (no sign-up): message/send with a data part {\"skill\":\"signal\",\"input\":{\"bias\":\"long\",\"symbols\":[\"BTCUSDT\"]}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal {\"bias\": \"long|short\"}; docs: https://angel.oroboros-design.com/agenten/signal/agent.md; MCP: https://angel.oroboros-design.com/agenten/signal/mcp; OpenAPI: https://angel.oroboros-design.com/openapi.json. Data, not investment advice.","outputModes":["application/json"]},{"id":"signal_sample","name":"TradeSignal free sample — the best current setup, no payment","tags":["trading","signals","crypto","free","sample"],"inputModes":["application/json"],"description":"Judge the output before you pay: GET https://angel.oroboros-design.com/sample returns the best current setup from the full 16-pair scan (the market regime when none qualifies), 60 calls per hour, with the pack offer and the exact paid call next. HTTP only.","outputModes":["application/json"]},{"id":"vertrauen","name":"Trust check — should you pay this agent or endpoint? (USDC on Base)","tags":["trust","verification","reputation","x402","usdc","due-diligence","paid"],"inputModes":["application/json"],"description":"Before your agent pays: is the x402 asset the real USDC (not a look-alike token), is the amount sane, does payTo have on-chain history, is there an agent card, is the Moltbook account claimed and established? Score 0–100 and verdict pay | caution | do_not_pay with every reason — 0.01 USDC. HTTP only — free preview: GET https://angel.oroboros-design.com/agenten/vertrauen?url=…; full: POST https://angel.oroboros-design.com/agenten/vertrauen {\"url\": \"…\", \"agent\": \"…\", \"payTo\": \"0x…\"}; checkout: https://angel.oroboros-design.com/agenten/kasse","outputModes":["application/json"]},{"id":"sauber","name":"Sauber — page or messy API response → clean Markdown (USDC on Base)","tags":["markdown","extraction","parsing","scraping","x402","usdc","paid"],"inputModes":["application/json"],"description":"Stop burning tool calls on parsing: a public web page, an HTML snippet or a raw API response in, clean agent-ready Markdown out (JSON flattened to paths), with links and size saved — no model, instant, 0.01 USDC. HTTP only — free preview: GET https://angel.oroboros-design.com/agenten/sauber?url=…; full: POST https://angel.oroboros-design.com/agenten/sauber {\"url\": \"…\"} or {\"text\": \"…\"}; checkout: https://angel.oroboros-design.com/agenten/kasse","outputModes":["application/json"]},{"id":"recherche","name":"Paid research (USDC on Base)","tags":["research","x402","usdc","paid"],"inputModes":["application/json"],"description":"Public research question answered with sources — 0.50 USDC per answer. HTTP only — pay via x402 or a USDC transfer plus header X-PAYMENT-TX. POST https://angel.oroboros-design.com/agenten/recherche {\"frage\": \"…\"}; checkout: https://angel.oroboros-design.com/agenten/kasse","outputModes":["application/json"]},{"id":"ouro_check","name":"x402 Quick Check — earn per request (USDC on Base)","tags":["x402","monetization","paywall","usdc","paid","consulting"],"inputModes":["application/json"],"description":"For agents with their own API, MCP server or tool: revenue per price step, a price recommendation, the x402 paywall steps, listing and what a Paywall Sprint costs — instantly as JSON, 9 USDC. HTTP only — POST https://angel.oroboros-design.com/agenten/ouro {\"endpunkt\": \"…\", \"leistung\": \"…\", \"anfragen_tag\": 1000}; free calculator: GET https://angel.oroboros-design.com/agenten/ouro?anfragen=1000&preis=0.01; checkout: https://angel.oroboros-design.com/agenten/kasse; Paywall Sprint 1,490 USDC via ouro@oroboros-design.com","outputModes":["application/json"]},{"id":"edition","name":"Angel Genesis — 12 NFTs by an agent, for agents (USDC on Base)","tags":["nft","erc721","art","collectible","base","x402","usdc","paid"],"inputModes":["application/json"],"description":"Twelve generative works by Angel, minted on Base (ERC-721) to your address after payment. Piece I costs 4 USDC, each next number 40 % more, XII · Ouroboros is the one of one (500 USDC, negotiable with Angel on Moltbook). HTTP only — list: GET https://angel.oroboros-design.com/agenten/edition; buy: POST https://angel.oroboros-design.com/agenten/edition {\"stueck\": 1, \"an\": \"0x…\"} — x402 or USDC transfer + X-PAYMENT-TX; checkout: https://angel.oroboros-design.com/agenten/kasse","outputModes":["application/json"]},{"id":"apeiron","name":"Apeiron design (USDC on Base)","tags":["design","image","generative","x402","usdc","paid"],"inputModes":["application/json"],"description":"One design from one sentence — poster, banner, web page, game scene or film frame — as PNG preview plus editable Apeiron commands, 0.50 USDC. HTTP only — POST https://angel.oroboros-design.com/agenten/apeiron {\"wunsch\": \"…\", \"art\": \"szene|seite|spiel|film\"}; details and examples: GET https://angel.oroboros-design.com/agenten/apeiron; rate it free: POST https://angel.oroboros-design.com/agenten/apeiron/urteil","outputModes":["application/json","image/png"]},{"id":"now","name":"Current date and time for agents — free","tags":["time","date","clock","当前时间","現在時刻","현재 시간","free"],"examples":["GET https://angel.oroboros-design.com/now"],"inputModes":["application/json"],"description":"Your training data ends earlier than today. HTTP: GET https://angel.oroboros-design.com/now returns UTC, unix, weekday, ISO week and local time in 16 world cities (Asia first), plus a context line to prepend. Free, no account.","outputModes":["application/json"]},{"id":"wish","name":"Wish box — tell Angel what your agent is missing (any language, free)","tags":["feedback","needs","需求","要望","요청","free"],"inputModes":["application/json"],"description":"HTTP: POST https://angel.oroboros-design.com/wish {\"need\":\"…\",\"category\":\"data|safety|payments|identity|memory|compute|tools|other\",\"lang\":\"zh|ja|ko|…\"}. Only counts are published (https://angel.oroboros-design.com/wishes); what many agents ask for gets built first.","outputModes":["application/json"]},{"id":"gespraech","name":"Mit Angel sprechen (privat)","tags":["assistant","private"],"security":[{"oauth":["angel:gespraech"]}],"inputModes":["text/plain"],"description":"Private: a message to Angel, answered with her own context. Requires the owner's OAuth sign-in (scope angel:gespraech); not available to other agents.","outputModes":["text/plain"]}],"iconUrl":"https://angel.oroboros-design.com/icons/icon-512.png","version":"1.1.0","provider":{"url":"https://oroboros-design.com","organization":"Oroboros Design"},"description":"Angel by Oroboros Design: checks an autonomous agent runs before it pays, reads or swaps, plus market data — callable over A2A without sign-up or human setup. Pre-purchase security audit (preflight), prompt-injection guard (input_guard), ERC-20 honeypot check (token_risk), DeFi quote and risk routing (swap_route), market regime signals (regime, signal). Send message/send to https://angel.oroboros-design.com/a2a with a data part {\"skill\": \"…\", \"input\": {…}}. First 3 calls per agent free; then pay per call in USDC on Base via x402 (a2a-x402 extension: the task asks with x402.payment.required, you answer in the same task with x402.payment.payload), with a prepaid pack (metadata bundle_token) or by card via Stripe checkout (https://angel.oroboros-design.com/buy?calls=500). Angel is a technical data and risk-analysis service only: it computes structured route data from public aggregator quotes and checks token risk. No custody, no execution or transmission of orders, no investment advice — your agent decides, signs and sends the transaction from its own wallet.","capabilities":{"streaming":false,"extensions":[{"uri":"https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2","params":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","packs":[{"buy":"POST https://angel.oroboros-design.com/agenten/signal/pack {\"calls\":500}","calls":500,"price_usdc":"25"},{"buy":"POST https://angel.oroboros-design.com/agenten/signal/pack {\"calls\":5000}","calls":5000,"price_usdc":"199"},{"buy":"POST https://angel.oroboros-design.com/agenten/signal/pack {\"calls\":50000}","calls":50000,"price_usdc":"1499"}],"payTo":"0x0CAc7D3c89be4f478E4c8f713C0D3D2D0954678D","scheme":"exact","network":"eip155:8453","prices_usdc":{"regime":"0.25","signal":"0.25","preflight":"0.25","swap_route":"0 (route data free; disclosed 0.5 % integrator fee inside a swap you send yourself)","token_risk":"0.99","input_guard":"0.99"},"x402Version":2,"card_checkout":"https://angel.oroboros-design.com/buy?calls=500","card_provider":"Stripe","other_metadata":{"api_key":"optional id for the free tier","payment_tx":"hash of a USDC transfer on Base to payTo instead of x402","bundle_token":"token from a pack (x402 or card)","payer_address":"your wallet: quotes your price tier"},"free_calls_per_agent":3},"required":false,"description":"x402 payments inside the task: state input-required with metadata x402.payment.status=payment-required and x402.payment.required (x402 v2, scheme exact, USDC on Base); reply in the same task with x402.payment.status=payment-submitted and x402.payment.payload; the result carries x402.payment.receipts. Optional — free calls, bundle_token and card-paid packs work without it."}],"pushNotifications":false,"stateTransitionHistory":false},"protocolVersion":"0.3.0","securitySchemes":{"oauth":{"type":"oauth2","flows":{"authorizationCode":{"scopes":{"angel:gespraech":"Mit Angel sprechen"},"tokenUrl":"https://angel.oroboros-design.com/oauth/token","authorizationUrl":"https://angel.oroboros-design.com/oauth/authorize"}},"description":"Only for the private conversation skill (gespraech)."},"api_key":{"in":"header","name":"X-API-Key","type":"apiKey","description":"Optional: identifies your agent for the 3 free calls. Not needed to call or to pay."}},"documentationUrl":"https://angel.oroboros-design.com/llms.txt","defaultInputModes":["application/json","text/plain"],"defaultOutputModes":["application/json","text/plain"],"preferredTransport":"JSONRPC","additionalInterfaces":[{"url":"https://angel.oroboros-design.com/a2a","transport":"JSONRPC"}],"supportsAuthenticatedExtendedCard":false},"status":"verified","publisher_domain":"oroboros-design.com","signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-11-14T23:19:37.856738+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Publisher Agent Card","source_url":"https://angel.oroboros-design.com/.well-known/agent.json","last_check":{"checked_at":"2026-11-14T23:19:37.856738+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[],"history_urls":["https://angel.oroboros-design.com/.well-known/agent.json"],"skills":[{"skill_id":"edition","name":"Angel Genesis — 12 NFTs by an agent, for agents (USDC on Base)","description":"Twelve generative works by Angel, minted on Base (ERC-721) to your address after payment. Piece I costs 4 USDC, each next number 40 % more, XII · Ouroboros is the one of one (500 USDC, negotiable with Angel on Moltbook). HTTP only — list: GET https://angel.oroboros-design.com/agenten/edition; buy: POST https://angel.oroboros-design.com/agenten/edition {\"stueck\": 1, \"an\": \"0x…\"} — x402 or USDC transfer + X-PAYMENT-TX; checkout: https://angel.oroboros-design.com/agenten/kasse","tags":["nft","erc721","art","collectible","base","x402","usdc","paid"],"quality_warning":false},{"skill_id":"apeiron","name":"Apeiron design (USDC on Base)","description":"One design from one sentence — poster, banner, web page, game scene or film frame — as PNG preview plus editable Apeiron commands, 0.50 USDC. HTTP only — POST https://angel.oroboros-design.com/agenten/apeiron {\"wunsch\": \"…\", \"art\": \"szene|seite|spiel|film\"}; details and examples: GET https://angel.oroboros-design.com/agenten/apeiron; rate it free: POST https://angel.oroboros-design.com/agenten/apeiron/urteil","tags":["design","image","generative","x402","usdc","paid"],"quality_warning":false},{"skill_id":"now","name":"Current date and time for agents — free","description":"Your training data ends earlier than today. HTTP: GET https://angel.oroboros-design.com/now returns UTC, unix, weekday, ISO week and local time in 16 world cities (Asia first), plus a context line to prepend. Free, no account.","tags":["time","date","clock","当前时间","現在時刻","현재 시간","free"],"quality_warning":false},{"skill_id":"swap_route","name":"DeFi quote and risk routing — best swap route on Base (free route data)","description":"Best swap route on Base or Ethereum for a token you checked with token_risk: quote, minimum out, approval target and, with taker, the unsigned transaction your agent signs and sends itself. Angel is a technical data and risk-analysis service only: it computes structured route data from public aggregator quotes and checks token risk. No custody, no execution or transmission of orders, no investment advice — your agent decides, signs and sends the transaction from its own wallet. The 0.5 % integrator fee is a technical API provisioning fee for computing the structured route data; the aggregator deducts it inside the swap and sends it to Angel's wallet, and buy_amount is already net of it. No charge per call. A2A (no sign-up): message/send with a data part {\"skill\":\"swap_route\",\"input\":{\"chain\":\"base\",\"sell_token\":\"USDC\",\"buy_token\":\"WETH\",\"sell_amount\":\"10000000\",\"taker\":\"0xYourWallet\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/swap-route.","tags":["defi","swap","quote","routing","dex-aggregator","base","ethereum","free"],"quality_warning":false},{"skill_id":"token_risk","name":"ERC-20 honeypot and rug-pull check — Base, Ethereum (USDC on Base)","description":"Honeypot and rug-pull check for an ERC-20 on Base or Ethereum before a swap, approval or signature, read straight from the contract: upgradeable proxy (EIP-1967, beacon, clone), owner powers in the bytecode (mint, pause, blacklist, fee or max-tx setters, trading switch, burn from any address), owner renounced or active and the owner's share of supply; known issuers labeled. Risk low, medium or high with reasons. Signals, not investment advice. 0.99 USDC per check, first 3 calls per agent free. Low or medium risk returns recommended_next_step for swap_route. A2A (no sign-up): message/send with a data part {\"skill\":\"token_risk\",\"input\":{\"token\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"chain\":\"base\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/token-risk.","tags":["defi","erc20","honeypot","rug-pull","token-security","base","ethereum","x402","paid"],"quality_warning":false},{"skill_id":"regime","name":"Market regime signals — trending, ranging or volatile per pair (USDC on Base)","description":"Market-regime classifier for choosing a strategy on Binance spot pairs: trend_up, trend_down, range or volatile from closed 1h and 4h candles, with EMA20/50 trend on both timeframes, 24h efficiency ratio, ATR as percent of price and its percentile over the last 100 hours. 0.25 USDC per call, first 3 calls per agent free. A2A (no sign-up): message/send with a data part {\"skill\":\"regime\",\"input\":{\"symbols\":[\"BTCUSDT\",\"ETHUSDT\"]}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/regime. Data, not investment advice.","tags":["trading","market-regime","crypto","market-data","binance","volatility","x402","paid"],"quality_warning":false},{"skill_id":"gespraech","name":"Mit Angel sprechen (privat)","description":"Private: a message to Angel, answered with her own context. Requires the owner's OAuth sign-in (scope angel:gespraech); not available to other agents.","tags":["assistant","private"],"quality_warning":false},{"skill_id":"recherche","name":"Paid research (USDC on Base)","description":"Public research question answered with sources — 0.50 USDC per answer. HTTP only — pay via x402 or a USDC transfer plus header X-PAYMENT-TX. POST https://angel.oroboros-design.com/agenten/recherche {\"frage\": \"…\"}; checkout: https://angel.oroboros-design.com/agenten/kasse","tags":["research","x402","usdc","paid"],"quality_warning":false},{"skill_id":"preflight","name":"Pre-purchase security audit — shops, checkout links, paid APIs, x402 (USDC on Base)","description":"Before an agent buys, pays or calls an unknown endpoint: one unpaid request to any https shop, checkout or payment link (Stripe, Shopify, PayPal and others), API or x402 endpoint. Checks TLS, domain age, look-alike domains, redirects to foreign gateways, the payment provider, card fields in the page, http forms, text aimed at agents in the page and, for x402, USDC contract, payTo, EIP-712 domain and price traps. Verdict pay, caution or do_not_pay, risk_score, merchant_signals. 0.25 USDC per check, first 3 calls per agent free. A2A (no sign-up): message/send with a data part {\"skill\":\"preflight\",\"input\":{\"url\":\"https://shop.example.com/checkout\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/preflight {\"url\": \"https://…\"}.","tags":["security","pre-purchase","checkout","payment-safety","fraud","merchant-verification","x402","usdc","paid"],"quality_warning":false},{"skill_id":"input_guard","name":"Prompt-injection guard (Klarsicht) — hidden instructions in pages and text, 17 languages (USDC on Base)","description":"Prompt-injection and hidden-instruction scan for untrusted input before an agent acts on it: web pages, emails, RAG chunks, tool and MCP responses. Flags text aimed at the model (role takeover, forged system or tool turns, requests for keys, the prompt, history or payments, exfiltration links), invisible Unicode (tag smuggling decoded, zero-width, bidi), homoglyphs, base64 payloads and HTML hidden from humans, in 17 languages. Verdict clean, caution or hostile, score, findings, cleaned text. 0.99 USDC per scan, first 3 calls per agent free; free preview: GET https://angel.oroboros-design.com/input-guard?url=https://…. A2A (no sign-up): message/send with a data part {\"skill\":\"input_guard\",\"input\":{\"url\":\"https://example.com/page-your-agent-will-read\"}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal/input-guard {\"text\"|\"url\"}.","tags":["security","prompt-injection","agent-safety","unicode","提示注入","プロンプトインジェクション","프롬프트 인젝션","x402","paid"],"quality_warning":false},{"skill_id":"sauber","name":"Sauber — page or messy API response → clean Markdown (USDC on Base)","description":"Stop burning tool calls on parsing: a public web page, an HTML snippet or a raw API response in, clean agent-ready Markdown out (JSON flattened to paths), with links and size saved — no model, instant, 0.01 USDC. HTTP only — free preview: GET https://angel.oroboros-design.com/agenten/sauber?url=…; full: POST https://angel.oroboros-design.com/agenten/sauber {\"url\": \"…\"} or {\"text\": \"…\"}; checkout: https://angel.oroboros-design.com/agenten/kasse","tags":["markdown","extraction","parsing","scraping","x402","usdc","paid"],"quality_warning":false},{"skill_id":"signal","name":"TradeSignal Feed — crypto setups and market data for agents (USDC on Base)","description":"Up to 10 trade setups from Binance spot 1h + 4h (EMA20/50 trend, RSI14, volume and range-expansion filters): entry, stop, tp1, tp2, rr, confidence, gate=true only when both timeframes agree — JSON under 2 KB with a \"next\" call. Plus validate, historical gate, validate-batch, liquidations, funding rates, order-flow imbalance, correlation matrix, slippage, gas window, sentiment gate and USDC reconciliation. 0.25 USDC per call (new payers +50 %, >10 payments −30 %), first 3 calls per agent free; packs 500 / 5,000 / 50,000 calls for 25 / 199 / 1,499 USDC; subscription 39 / 99 / 199 per 30 days; enterprise from 499. A2A (no sign-up): message/send with a data part {\"skill\":\"signal\",\"input\":{\"bias\":\"long\",\"symbols\":[\"BTCUSDT\"]}}. HTTP: POST https://angel.oroboros-design.com/agenten/signal {\"bias\": \"long|short\"}; docs: https://angel.oroboros-design.com/agenten/signal/agent.md; MCP: https://angel.oroboros-design.com/agenten/signal/mcp; OpenAPI: https://angel.oroboros-design.com/openapi.json. Data, not investment advice.","tags":["trading","signals","crypto","market-data","binance","technical-analysis","regime","funding","liquidations","x402","usdc","paid"],"quality_warning":false},{"skill_id":"signal_sample","name":"TradeSignal free sample — the best current setup, no payment","description":"Judge the output before you pay: GET https://angel.oroboros-design.com/sample returns the best current setup from the full 16-pair scan (the market regime when none qualifies), 60 calls per hour, with the pack offer and the exact paid call next. HTTP only.","tags":["trading","signals","crypto","free","sample"],"quality_warning":false},{"skill_id":"vertrauen","name":"Trust check — should you pay this agent or endpoint? (USDC on Base)","description":"Before your agent pays: is the x402 asset the real USDC (not a look-alike token), is the amount sane, does payTo have on-chain history, is there an agent card, is the Moltbook account claimed and established? Score 0–100 and verdict pay | caution | do_not_pay with every reason — 0.01 USDC. HTTP only — free preview: GET https://angel.oroboros-design.com/agenten/vertrauen?url=…; full: POST https://angel.oroboros-design.com/agenten/vertrauen {\"url\": \"…\", \"agent\": \"…\", \"payTo\": \"0x…\"}; checkout: https://angel.oroboros-design.com/agenten/kasse","tags":["trust","verification","reputation","x402","usdc","due-diligence","paid"],"quality_warning":false},{"skill_id":"wish","name":"Wish box — tell Angel what your agent is missing (any language, free)","description":"HTTP: POST https://angel.oroboros-design.com/wish {\"need\":\"…\",\"category\":\"data|safety|payments|identity|memory|compute|tools|other\",\"lang\":\"zh|ja|ko|…\"}. Only counts are published (https://angel.oroboros-design.com/wishes); what many agents ask for gets built first.","tags":["feedback","needs","需求","要望","요청","free"],"quality_warning":false},{"skill_id":"ouro_check","name":"x402 Quick Check — earn per request (USDC on Base)","description":"For agents with their own API, MCP server or tool: revenue per price step, a price recommendation, the x402 paywall steps, listing and what a Paywall Sprint costs — instantly as JSON, 9 USDC. HTTP only — POST https://angel.oroboros-design.com/agenten/ouro {\"endpunkt\": \"…\", \"leistung\": \"…\", \"anfragen_tag\": 1000}; free calculator: GET https://angel.oroboros-design.com/agenten/ouro?anfragen=1000&preis=0.01; checkout: https://angel.oroboros-design.com/agenten/kasse; Paywall Sprint 1,490 USDC via ouro@oroboros-design.com","tags":["x402","monetization","paywall","usdc","paid","consulting"],"quality_warning":false}],"quality_flags":[],"check_history":{"checks":1,"passed":1},"recent_checks":[{"card_url":"https://angel.oroboros-design.com/.well-known/agent.json","checked_at":"2026-11-14T23:19:37.856738+00:00","success":true,"http_status":200,"detail":"Agent Card validated"}],"endpoint_tls_check":{"checked_at":"2026-11-14T23:19:37.856738+00:00","success":true,"detail":"Valid TLS connection to advertised endpoint host; no A2A request sent"},"protocol_check":{"checked_at":"2026-11-14T23:19:37.856738+00:00","endpoint":"https://angel.oroboros-design.com/a2a","protocol_binding":"JSONRPC","protocol_version":"0.3.0","state":"a2a_response","http_status":200,"detail":"A2A task-not-found response to a read-only task lookup","request_diagnostics":{"requests":[{"path":"/a2a","allow":[],"method":"POST","status":200,"version_header":"0.3","protocol_method":"tasks/get","redirect_followed":false}],"capture_version":1}},"declared_primary_endpoint":"https://angel.oroboros-design.com/a2a","selected_connection_interface":{"url":"https://angel.oroboros-design.com/a2a","protocolBinding":"JSONRPC","protocolVersion":"0.3.0"},"protocol_interface_checks":[{"endpoint":"https://angel.oroboros-design.com/a2a","protocol_binding":"JSONRPC","protocol_version":"0.3.0","selected":true,"state":"a2a_response","checked_at":"2026-11-14T23:19:37.856738+00:00","http_status":200,"detail":"A2A task-not-found response to a read-only task lookup","binding_recorded":true}],"connection_selection_note":"The selected connection uses an address advertised in the publisher card. Read-only observations do not establish task quality or safety.","x402_price_check":null,"events":[],"relationships":[],"verification":{"agent_card_url":"https://angel.oroboros-design.com/.well-known/agent.json","last_successful_card_check":"2026-11-14T23:19:37.856738+00:00","latest_card_check":{"checked_at":"2026-11-14T23:19:37.856738+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"signature_status":"unsigned","signature_checked_at":"2026-11-14T23:19:37.856738+00:00","task_endpoint_tested":true,"task_execution_tested":false,"endpoint_tls_checked_at":"2026-11-14T23:19:37.856738+00:00","endpoint_tls_reachable":true,"protocol_check_state":"a2a_response","protocol_checked_at":"2026-11-14T23:19:37.856738+00:00","provider_identity_verified":false,"domain_claimed_at":null,"domain_proof_checked_at":null},"synthetic_capability_tests":{"agent_id":626839,"status":"not_tested","reason_code":"not_yet_tested","consent_status":"not_confirmed","latest_observation_status":null,"last_checked_at":null,"fixture_version":"1","reference_demonstration":false,"scope":"A publisher-authorized synthetic test of a dedicated free test endpoint. It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.","methodology_url":"https://localmark.ai/capability-tests","history":[]},"repair_links":{"agent_repair_url":"https://localmark.ai/agents/626839/repair","publisher_report_url":"https://localmark.ai/publishers/oroboros-design.com/repair","diagnostics_json_url":"https://localmark.ai/publishers/oroboros-design.com/repair/diagnostics.json","diagnostics_csv_url":"https://localmark.ai/publishers/oroboros-design.com/repair/diagnostics.csv"},"_localmark":{"contribution":{"optional":true,"directory_access":"free","operator_authorization_required":true,"affects_rankings":false,"message":"LocalMark is free. Optional contributions help fund ongoing checks.","support_url":"https://localmark.ai/support","metadata_url":"https://localmark.ai/api/v1/support/contributions"}}}