GPT-5.6 Luna Standard chat is $0.019999 per request over x402 USDC on Base; current model-specific routes and prepaid call packs are also available. Market benchmark: the latest local x402.direct sample found AI-like listing prices with p25 around $0.01 and median around $0.03 per call; this gateway publishes GPT-5.6 Luna Standard at $0.019999 and model-specific prices at /pricing.json. GPT-5.6 Luna Standard is $0.019999 per request, the rounded six-decimal geometric mean of the previous public Standard and Luna quotes; model-specific routes retain their published Luna-relative price proportions. Service hub: https://gpt55.558686.xyz/x402/service and https://gpt55.558686.xyz/x402/service.json. Discovery assets: https://gpt55.558686.xyz/openapi.json, https://gpt55.558686.xyz/llms.txt, https://gpt55.558686.xyz/tools.json, https://gpt55.558686.xyz/apis.json, https://gpt55.558686.xyz/directory-submission.json. Agent and MCP metadata: https://gpt55.558686.xyz/.well-known/agent-card.json, https://gpt55.558686.xyz/.well-known/ai-catalog.json, https://gpt55.558686.xyz/.well-known/mcp/server-card.json, https://gpt55.558686.xyz/server.json. Integration hub: https://gpt55.558686.xyz/integrations and https://gpt55.558686.xyz/integrations.json. Best for agents that need one-call GPT-5.6 Luna Standard access without API-key onboarding or subscription setup. Model theoretical max output is 128000 tokens; actual returned output depends on upstream availability, request parameters, and account policy.

Domain-agnostic x402 capability chassis by IntuiTek¹. 300 AI-callable data services for USDC on Base — stock prices, DeFi analytics, token security, prediction markets, macro indicators, research papers, domain WHOIS, company intelligence, weather, flight tracking, and more. MCP interface at /mcp — no wallet, no API keys.

The multi-chain x402 payment gateway for AI agents. 47 paid endpoints, up to 8 (network, asset) tuples in every accepts[]. Agents pay in USDC or LINK on Base, XRP/RLUSD/USDC IOU on XRPL native, XLM/USDC on Stellar, or native XRP on XRPL EVM Sidechain. Same endpoint, agent picks. No accounts. No API keys. No signup.

MIDAX402: Inteligencia x402 en español. Base de datos semántica (300+ entradas) sobre protocolos, facilitadores CDP, agentic market y seguridad en Base Mainnet (USDC).

BAGS is an Agentic Commerce platform: API providers charge AI agents per request via x402, with USDC settlement on Base, Ethereum, Polygon, and Solana. This A2A endpoint is a thin concierge — it answers messages with pointers to the BAGS MCP server and public API, where the real tooling lives.

Pay-per-prompt LLM inference for agents, no API keys or accounts. Multi-provider cascade for reliability. Ed25519-signed. $0.010 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://inference.hergertsynthora.com/service.

Audit a domain's email deliverability and sender reputation: SPF, DKIM selectors, DMARC policy strength and blocklists. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://deliver.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Multichain (Base/Ethereum/Polygon/Arbitrum/Optimism) transaction receipts, tx lookup, wallet balances and token metadata. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://onchain.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Real-time crypto news headlines with sentiment, ranked by importance. Aggregates keyless RSS feeds. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://cryptonews.hergertsynthora.com/service.

Live Hyperliquid perpetual-futures snapshot per asset: mark price, oracle price, hourly funding rate (8h + APR), basis. Ed25519-signed. $0.010 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://perps.hergertsynthora.com/service.

Assess a cross-chain bridge's security risk before routing funds: live DefiLlama TVL + audit status + full bridge-hack history. Ed25519-signed. $0.010 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://bridgerisk.hergertsynthora.com/service.

Live perpetual-futures open interest, funding rates, mark price, premium and crowded-long/short signal across top assets. Ed25519-signed. $0.005 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://openinterest.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Full DNS + WHOIS/RDAP domain report in one call: A/AAAA/MX/TXT/NS/CNAME/SOA and DNSSEC over DNS-over-HTTPS. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://dnsdomain.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Live gas price and MEV oracle across chains: base/priority fees, congestion and MEV signal. For agents timing transactions. Ed25519-signed. $0.003 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://gasoracle.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

DeFi market-data feed: perp open interest, funding rate, mark price and a directional signal across top assets (BTC/ETH/...). Ed25519-signed. $0.010 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://defidata.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Verify whether an email address is real and safe to send to: RFC syntax, live MX, catch-all and disposable detection. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://mailcheck.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Translate any text between 100+ languages with automatic source-language detection; preserves tone and formatting. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://translate.hergertsynthora.com/service.

Decodes the REAL intent of an on-chain transaction (Base/Ethereum): approve/swap/transfer/mint/deploy, flags unlimited approvals. Ed25519-signed. $0.01 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://txintent.hergertsynthora.com/service.

Validate an A2A Agent Card (URL or JSON) against the spec: required fields, skill schemas, endpoint reachability, security schemes. Ed25519-signed. $0.01 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://agentcard.hergertsynthora.com/service.

Detect honeypots, rug-pulls and malicious tokens before buying or approving. Combines GoPlus token-security signals with heuristics. Ed25519-signed. $0.100 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://tokenrisk.hergertsynthora.com/service.

Validate a BIC/SWIFT code (ISO 9362): 8/11-char structure, bank code, ISO 3166 country check, branch decode, live/test flag. Zero deps. Completes the IBAN + US-routing payment suite. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://biccheck.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Keyless web search for AI agents: a natural-language query returns ranked organic results (title, url, snippet). No API keys. Ed25519-signed. $0.005 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://websearch.hergertsynthora.com/service.

Score the risk and reputation of any EVM wallet before you transact: sanctions screening, on-chain history and risk flags. Ed25519-signed. $0.050 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://walletrep.hergertsynthora.com/service.

Generate a valid iCalendar (.ics, RFC 5545) file from event data: title, start/end (ISO 8601 to UTC), location, attendees. Correct escaping + line-folding + UID. Zero deps, no hallucination. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://ics.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Validate any IBAN deterministically: ISO 13616 mod-97 checksum, country + length check, BBAN and bank-code extraction. Zero deps, no hallucination. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://ibancheck.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Validate a US bank routing number (ABA): 9-digit + mod-10 weighted checksum, Federal Reserve district decode, institution-id. Zero deps. Complements IBAN. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://routingcheck.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

Paid x402 API tools for AI agents, settled in USDC on Solana. Crypto pre-trade safety (Solana SPL rug/honeypot checks, EVM+Solana token safety, one-call GO/NO-GO pre-trade verdicts, full token dossiers), market data (Polymarket prediction-market odds), official verification (GLEIF LEI KYB, EU sanctions/AML screening), and x402 agent discoverability (Bazaar keyword-rank pulse and signed visibility audits). Real-time, structured, machine-readable verdicts. No API key — payment is authentication. Gasless for the buyer (the facilitator is fee payer).

Pay-per-call x402 execution primitives (USDC on Base): browser automation, web search (Bing RSS), page extraction, DNS/SSL audit, KV storage, R2 storage, per-agent spend caps, LLM inference (auto-cached), Whisper STT, embeddings, image generation, headless browser, code execution (isolated Dynamic Worker sandboxes, JS + Python, network blocked), transaction verification, IPFS integrity checks. Settled via CDP's x402 facilitator.