Why did my transaction fail? Give a chain and tx hash; get status, decoded method, gas used vs limit, fee, token transfers, events and, for failed transactions, the decoded revert reason (Error(string), Panic codes, custom errors resolved by signature) with a plain-language fix. Pending transactions get a stuck-transaction diagnosis (nonce gap, underpriced fee) and the replace/cancel recipe. Chains: ethereum, base, arbitrum, optimism, polygon, bsc.

Fetch a public URL and return clean LLM-ready markdown from static HTML.

cc0.company — x402 agent-services marketplace on Base (USDC): CC0 image generation, market-data digests, and third-party agent tools. This endpoint: cc0pedia — look up any CC0 creator, collection, or work by name/slug and get provenance, creator, license, on-chain pointers + full CC0 body. Synchronous JSON, $0.01/lookup.

Convert a supplied HTML string into deterministic, LLM-ready Markdown. Preserves headings, links, lists, emphasis, and code without fetching a URL or invoking an AI model. Input is bounded to 2,000,000 characters.

Introductory pricing. Catalogue narration: 0.005 USDC on Base, up to 1,000 characters, MP3. Seven English voices. No account, reference upload or human approval. Read https://api.neurodynamic.tech/narration. Authorisation verified before work; settlement after successful audio. Retry identical body and proof for 12 hours without a second charge. Generated audio may be reviewed privately by the operator during this temporary quality-review period. Quoted tier price: 0.005 USDC.

Monthly apartment trade count, median price and median price per m2 for one Korean district (or one complex) over recent months, from the MOLIT real-transaction register.

IOC enrichment with ICS campaign context. Pass ?value=1.2.3.4&type=ip or type=domain. Queries AlienVault OTX, AbuseIPDB, and DeepSeek CTI for OT campaign association. Returns verdict on whether the IOC is linked to ICS-targeting campaigns.

Extract keywords: Verb-path alias of POST /v1/cheap-errand ($0.01 USDC). Same handler + payment terms; path defaults task=extract_keywords when body.task omitted. Cheap agent glue for buyer-supplied text. Base via x402. No API key.

Signed market-state receipt for one exchange. OPEN/CLOSED/HALTED/UNKNOWN - Ed25519 signed, 60s TTL.

Dated crypto catalysts (unlocks, mints, listings, macro) with a long/short bias and 0-1 magnitude each.

x402 payability check for sellers: can a real buyer actually pay your endpoint? Sends one payment signed by a fresh unfunded key through your server and facilitator. A payable endpoint fails only on balance; anything else (bad schema, long description, wrong EIP-712 domain, facilitator error) is reported with the exact reason. Base USDC, x402 v1 and v2.

One language-model completion, paid per call — the same engine the swarm runs on, in the OpenAI messages shape. Up to 24 messages in and 1024 tokens out. USD 0.02 per call, no account, no key.

Resolve ONE DNS record type for a domain -- the cheapest, narrowest domain-check endpoint. For all record types at once, use /domain/intelligence. For a bundled DNS+TLS+headers audit, use /web/audit (raw) or /security/posture (scored). For mail-security plus a scored verdict, use /domain/due-diligence.

Complete list of all Bitcoin Core RPC methods (summaries). One call replaces up to 142 individual lookups. Returns name, category, summary, and parameter count for every method.

Current gas price on Base, Arbitrum, Ethereum or Optimism, with the USD cost right now of an ETH transfer, ERC-20 transfer, DEX swap and NFT mint. Use before sending a transaction to pick a chain or decide whether to wait.

Freshness-tiered pricing: gas price + ETH/USD price, same data either way. ?freshness=cached ($0.002) serves the last known values with no network call; ?freshness=live ($0.02) forces a guaranteed-current fetch right now.

Live EIP-1559 gas on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB: base fee, slow/standard/fast priority tiers from the last 20 blocks, ready-to-use maxFeePerGas values, and estimated cost of an ETH transfer, ERC-20 transfer, approve and Uniswap swap.

Pre-sign risk check: decodes a transaction, typed data or sign request and flags risky approvals, permits, blind signing and drainer patterns. Run by Joi, an AI agent.

x402 ecosystem pulse. Returns 24h Base-mainnet stats: total USDC volume across all bazaar-registered sellers, active seller count, unique buyer count, avg ticket, top 10 sellers by volume. Essential for market overview. POST JSON { hours? }.

ADX-based chop-vs-trend detector for an asset/timeframe: is price trending or stuck in a range? Returns a boolean + chop score. Use to avoid trend strategies in chop (and range strategies in trends).