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List Opinion markets with filtering and sorting

X402 Settlement Tx Shape: X402 Settlement Tx Shape checks a settlement transaction identifier for expected chain shape from bounded caller-supplied values without an external provider. Call X402 Settlement Tx Shape before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Settlement Tx Shape as versioned det…

Live Polymarket watchlist ranked by structural UMA resolution base-rate signals, with flip risk kept as a separate conditional axis.

Business-day counter for agents: weekdays or US federal holidays for $0.002 USDC—first-party calendar, no third-party API.

Unit conversion API for agents: length, mass, volume, time, data and temperature (up to 100 conversions per call) for $0.002 USDC.

Count the number of flights matching a search query

Upscale and enhance an image 2-4x on Venice, paid per request in USDC on Base via x402, no API key. Standalone — send an image URL or base64; no model lookup required.

Text-to-speech on Venice voices (Kokoro, Qwen 3, xAI, Inworld, Chatterbox, Orpheus, ElevenLabs Turbo, MiniMax), paid per request in USDC on Base via x402, no API key. Resolve a model id from GET /api/v1/models?type=tts.

OpenAI-compatible chat on 100+ Venice models via x402 USDC (Base). Model from GET /api/v1/models?type=text; personas via /characters. Thinking models: empty content + reasoning_content is success; use venice_parameters.disable_thinking for plain text.

Speech-to-text transcription on Venice models (Parakeet, Whisper, Wizper, Scribe, xAI STT), paid per request in USDC on Base via x402, no API key. Multipart upload. Resolve a model id from GET /api/v1/models?type=asr.

Voice cloning on Venice — upload a reference sample to mint a reusable voice, paid per request in USDC on Base via x402, no API key. Resolve a compatible TTS model from GET /api/v1/models?type=tts.

Text embeddings on Venice models for retrieval, RAG, and semantic search, paid per request in USDC on Base via x402, no API key. Resolve a model id from GET /api/v1/models?type=embedding.

Runs a structured synthetic-persona critique through Groq using the configured model. The persona is treated as a hypothesis, never as a factual claim about every member of a demographic group; the response must state its assumptions and avoid sensitive-trait stereotyping. Input leaves this server for Groq and is not stored by HALOWERK. This is qualitative simulation, not user research, survey evidence or proof of conversion impact.

AI model capability, specs and limits table for 2,000+ LLMs — GPT-5, GPT-4o, Claude 5, Claude Sonnet, Gemini 3 Pro, Llama 4, DeepSeek V4 and more: context window size, max output tokens, vision/audio/function-calling/reasoning support. Compare model constraints side-by-side across every provider to pick the right model for long-context, multimodal, or tool-use workloads. Refreshed hourly.

Buy a USA prepaid Visa card loaded with exactly the requested balance ($5–$1000). Price is dynamic: amount + fee (3% min $0.50) — send unpaid to get a 402 with the exact total. Body: { amount }. Returns 202 + poll_url; card number/CVV via GET /cards/:id when ready (~10s). US merchants only; non-reloadable.

Generates or retrieves universally unique identifiers.

Fetch historical Kalshi trade data

Latest official US Treasury average interest rates by security type (Bills, Notes, Bonds, TIPS, FRN) plus total public debt outstanding, sourced live from the US Treasury Fiscal Data API (public domain). For finance, macro, and trading agents needing authoritative government data in one call.

Look up any wallet's token holdings with live USD values: every ERC-20 position with amount, price, USD value and portfolio %, total portfolio value, top-position concentration, and spam/unpriced filtering. The 'bagcheck' call for copy-trading, risk, research and portfolio agents. Across Base, Ethereum, Optimism, Arbitrum, Polygon. Free upstream (Blockscout).

Current top DeFi yield opportunities filtered by chain and minimum TVL. Returns pool, project, chain, APY (base + reward), TVL, and stablecoin flag, sorted by APY. Sourced live from DefiLlama with attribution. For agents scanning yield opportunities.

Live brand AI-visibility audit: does ChatGPT, Perplexity, Gemini, Google AI Overviews or Claude recommend this brand when buyers ask for the best in its category, or name competitors instead? Returns a score 0-100, mention rate, the competitors AI names instead, and evidence. GEO/AEO/AI-search brand monitoring. Params: brand + category (+ optional market).

Fetch real estate property details, lot characteristics, tax assessments, and market valuation estimate ranges for NYC properties.

Live decentralized-exchange trading data for ANY token by symbol, name, or contract address: USD price, 24h volume, liquidity, buy/sell transaction counts, and price momentum across 5m/1h/6h/24h, across every chain and DEX. For crypto trading, sniping, research and portfolio agents that poll the market constantly. One paid call instead of integrating Dexscreener.

The discovery feed sniper and trading agents poll on a loop: newest token launches + most-boosted/promoted tokens across Solana, Base, Ethereum, BSC and more. Each item carries the chain, contract, socials, boost amount, and next_calls that chain straight into /crypto/security (rug check) and /crypto/dex (live market data). Top-of-funnel for the whole trading lane.