Every agent-payable API.

x402 test counterparty — prove your payment stack end to end with a real settlement on Base.

x402 Top Merchants by Estimated Revenue. x402 top merchants by estimated 30-day revenue: resources, calls, top resource and its paying agents, categories and networks for every seller in Coinbase's x402 catalog.

Trust score (0-100, grade A-F) for any x402 endpoint -- listed in our catalog or not. Unlike uptime-only checkers, we return ECONOMIC PROOF: the REAL on-chain USDC settlement volume and distinct-payer count for the endpoint's payTo address -- is anyone actually paying it, or is it just live? Computed deterministically from continuous monitoring: 30d probe uptime, 402-envelope spec compliance, latency, observed age, on-chain settlement activity, and advertised-price stability. Includes a full component breakdown, machine-readable flags, and an honest observedDays (we report only the history we actually have, with dataCompleteSince marking our gap-free on-chain coverage). Uncataloged endpoints are live-probed on your first query and auto-adopted into the monitored catalog (first-contact score with low confidence -- history accumulates from there). Each paid call also refreshes the endpoint's free public snapshot (page, badge, card), so a fresh score shows everywhere immediately. Know bef

ERC-8004 Inspector agent lookup (identity + reputation) — per call

Buyers need confidence that wallet, agent card, domain label, MCP server, seller profile, and x402 receiver belong together.

x402dir facilitator recommender: pick the best x402 payment facilitator by chain, token, and monthly volume. Returns ranked facilitators with fee estimates (JSON).

x402engine — Meta's open-source model — great general-purpose performance at very low cost

x402engine — MiMo-V2.6-Flash is an open-source foundation model developed by Xiaomi. Built on a Mixture-of-Experts architecture with 309B total parameters and 15B activated per token, it employs a hybrid attention mechanism for...

x402engine — OpenAI's cheapest GPT-5 tier — ultra-affordable for high-volume agent tasks

x402engine — Generate text embeddings using OpenAI text-embedding-3-small — for semantic search, clustering, RAG

x402engine — GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while

x402engine — Zhipu AI's flagship model — strong multilingual and reasoning performance

x402engine — AionLabs' compact reasoning model for efficient general-purpose inference

x402engine — Mistral Large 4 is a frontier multimodal (text and image input) model from Mistral AI built for reasoning, coding, and agentic workloads. It offers a 512K-token context window with up...

x402engine — DeepSeek's stronger V4 model — advanced reasoning, coding, and long-context analysis

x402engine — Real-time DEX-derived token prices with OHLC data — up to 200 tokens per request

x402engine — OpenAI's efficient GPT-5.6 tier with a 1M-token context window

x402engine — OpenAI's higher-compute Luna tier for efficient long-context reasoning

x402engine — Google's low-cost multimodal model for high-volume agent workloads

x402engine — Mistral's code-focused model — optimized for software development and technical tasks

x402engine — Google's fastest and cheapest model — ideal for high-volume, low-latency tasks

x402engine — Transaction history with asset transfers and labels for any wallet

x402engine — Alibaba's latest model — 1M context, strong multilingual and coding capabilities

x402engine — GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic...

x402engine — MiMo-V2.6-Pro is the flagship foundation model developed by Xiaomi. Built at a scale of over 1T parameters, it is designed to push the ceiling of capability for the most demanding...

x402engine — Meituan's long-context model for reasoning, coding, and high-volume inference

x402engine — MiniMax's latest model — improved reasoning and generation with 204k context

x402engine — MiniMax's multimodal foundation model — 1M context for agentic work, coding, and long-document tasks

x402engine — Alibaba's flagship open model — excellent multilingual and coding capabilities

x402engine — MiniMax's efficient model — fast and affordable for everyday tasks

x402engine — Simulate EVM transactions before sending — get gas estimates, execution traces, and revert reasons

x402engine — DeepSeek V3.2 served on the Speciale compatibility route — strong reasoning and coding at low cost

x402engine — DeepSeek's latest flagship model — improved reasoning and coding over V3 at same low cost

x402engine — Meta's latest open model — 1M context, strong multilingual and reasoning at very low cost

x402engine — Alibaba's code-specialized model — optimized for code generation, review, and technical tasks

x402engine — Fast, affordable GPT-4o variant — great for simple tasks and high-volume use

x402engine — Tencent's efficient reasoning model with a 262k-token context window

x402engine — Qwen3.8 Omni Flash is an omni-modal reasoning model from Alibaba, the first Qwen model built around agentic capabilities with native audio-video understanding. It is suited for audio-video analysis and summarization,...

x402engine — xAI's latest multimodal model with 500k context and strong tool use

x402engine — OpenAI's balanced GPT-5.6 tier for advanced reasoning and agent workflows

x402engine — Anthropic's latest balanced model — excellent coding, reasoning, and creative writing

x402engine — Google's latest flagship — advanced reasoning, coding, and multimodal with extended thinking

x402engine — Alibaba's flagship Qwen 3.7 model — 1M context for agent-centric coding and productivity tasks

x402engine — Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...

x402engine — Anthropic's balanced frontier model with 1M context and strong coding performance

x402engine — Animate a public image into a 5-second video with Kling V3 Pro

x402engine — Voxtral Mini TTS through OpenRouter; 30 voices, MP3 audio, up to 2000 UTF-8 bytes of text

x402engine — GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. It is suited for agentic coding, computer use, document-heavy professional...

x402engine — Anthropic's balanced model — excellent coding, reasoning, and creative writing

x402engine — Anthropic's previous-gen Opus — strong reasoning and creative writing, large context window