| Arch Tools — transform-text Arch Tools — transform-text |  archtools.dev | - | $0.01 | listed |
| Arch Tools — url-shorten (USDC on Base) Arch Tools — url-shorten (USDC on Base) | archtools.dev | - | $0.01 | listed |
| Arch Tools — validate-data (USDC on Base) Arch Tools — validate-data (USDC on Base) | archtools.dev | - | $0.01 | listed |
| Arch Tools — video-generate Arch Tools — video-generate | archtools.dev | - | $1.10 | listed |
| Arch Tools — web-scrape Arch Tools — web-scrape | archtools.dev | - | $0.015 | listed |
| Arch Tools — web-search Arch Tools — web-search | archtools.dev | - | $0.025 | listed |
| Arch Tools — webhook-send Arch Tools — webhook-send | archtools.dev | - | $0.01 | listed |
| Arch Tools — whois-lookup Arch Tools — whois-lookup | archtools.dev | - | $0.01 | listed |
| Arch Tools — workflow-agent Arch Tools — workflow-agent | archtools.dev | - | $0.025 | listed |
| Arithmetic mean of numbers. Call when summarizing metrics, scores, or sensor lists mid-pipeline. Returns the mean of a numeric array as JSON. $0.001 USDC per successful call via x402 on Base—determini Arithmetic mean of numbers. Call when summarizing metrics, scores, or sensor lists mid-pipeline. Returns the mean of a numeric array as JSON. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors. |  delx.ai | - | $0.001 | listed |
| Arkham x402 Get Arkham Polymarket stats. $0.40 per call. |  arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket wallet tags. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket wallet PnL summary. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket prices. Provide at least one of: tokenAddress, conditionID. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham entity balance changes. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham transaction details. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket wallet stats summary. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket events. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket event positions. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket PnL chart. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket wallet prediction history. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket positions for a wallet. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket wallet event history. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket top holders. $0.60 per call. | arkm.com | - | $0.60 | listed |
| Arkham x402 Get Arkham Polymarket activity. $1.00 per call. | arkm.com | - | $1.00 | listed |
| Arkham x402 Get Arkham tag parameters. $1.00 per call. | arkm.com | - | $1.00 | listed |
| Arkham x402 Get Arkham Polymarket top events. $2.00 per call. | arkm.com | - | $2.00 | listed |
| Arkham x402 Get Arkham Polymarket leaderboard. $2.00 per call. | arkm.com | - | $2.00 | listed |
| Arkham x402 Get Arkham unenriched transfers. Priced per row: $0.20 × limit (default 20, max 1650); pass the smallest useful limit. | arkm.com | - | $4.00 | listed |
| Arkham x402 Get Arkham entity intelligence updates. Provide at least one of: since, from. $6.00 per call. | arkm.com | - | $6.00 | listed |
| Arkham x402 Get Arkham tag definition updates. Provide at least one of: since, from. $6.00 per call. | arkm.com | - | $6.00 | listed |
| Arkham x402 Get Arkham transfers with filters. Priced per row: $0.40 × limit (default 20, max 1650); pass the smallest useful limit. | arkm.com | - | $8.00 | listed |
| Arkham x402 Get Arkham contract intelligence. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham Exchange tokens. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham Altcoin Index. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham token balance by pricing ID or chain/address. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham token price change since a timestamp. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham cluster summary statistics. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get an Arkham Polymarket event. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham tag summary statistics. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 List supported Arkham entity types. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham WebSocket pricing info. $0.20 per call. | arkm.com | - | $0.20 | listed |
| Arkham x402 Get Arkham Polymarket order book. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket wallet portfolio summary. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham x402 Get Arkham Polymarket top event breakdown. $0.40 per call. | arkm.com | - | $0.40 | listed |
| Arkham-compatible ERC-20 transfers for one Base wallet, backed by the public Base transfer index; priced per bounded request Arkham-compatible ERC-20 transfers for one Base wallet, backed by the public Base transfer index; priced per bounded request |  oblique.markets | - | $0.04 | listed |
| Article API Skim: article extraction — URL to structured article JSON (title, author, date, summary, key points). No schema required. |  skim402.com | - | $0.015 | listed |
| Article Extractor Clean article text extraction — strips nav, ads, sidebars |  etherealgoodsco.store | - | $0.10 | listed |
| Artifact Inspector File type and MIME/media type inspector — identify bounded content by magic bytes and return SHA-256, size, and extension consistency without unpacking, malware scanning, or safety claims. |  x402atlas.com | - | $0.005 | listed |
| Artifact Inspector PKCS#10 certificate signing request (CSR) inspector — parse requested identities and public-key metadata, calculate a fingerprint, and check the included self-signature without CA approval claims. | x402atlas.com | - | $0.005 | listed |