{"service":"Signal Forge Email HTML Preflight","version":"0.4.0","status":"production","endpoint":"/x402/email-preflight","method":"POST","description":"Inspect supplied email HTML (up to 40,000 characters) for unresolved placeholders, image alt attributes, link syntax and unsubscribe markup. Optional check of up to five safe public links. Does not render inboxes, assess deliverability or certify compliance.","tags":["email","html","preflight","klaviyo"],"input_schema":{"type":"object","additionalProperties":false,"properties":{"html":{"type":"string","minLength":1,"maxLength":40000},"base_url":{"type":"string","minLength":1,"maxLength":2048},"check_links":{"type":"boolean"}},"required":["html"]},"output_schema":{"type":"object","required":["success","data","meta"],"properties":{"success":{"const":true},"data":{"type":"object","required":["assessment","findings","counts","link_checks","limitations"]},"meta":{"type":"object"}}},"example_request":{"html":"

New collection

Explore Unsubscribe","check_links":false},"example_response":{"success":true,"data":{"assessment":"review","findings":[{"code":"template_requires_platform_rendering","severity":"review"}],"counts":{"images":0,"links":2},"link_checks":[],"limitations":["No inbox rendering or deliverability testing."]},"meta":{"endpoint":"/x402/email-preflight","example_only":true}},"x402":{"x402Version":2,"payment_enforced":true,"mode":"x402_mainnet","network":"eip155:8453","network_name":"base","asset":"Base USDC","amount":"30000","price_usd":0.03,"maxTimeoutSeconds":1800,"pay_to":"0x7e4d786057930b66cb45e2017a587425ebade587","facilitator_url":"coinbase_cdp_authenticated","primary_endpoint":"/x402/email-preflight","paid_endpoints":["/x402/prospect-qualifier","/x402/business-snapshot","/x402/listing-optimizer","/x402/message-match","/x402/creative-check","/x402/prospect-batch","/x402/message-match-batch","/x402/campaign-link-check","/x402/email-preflight","/x402/offer-change-check"],"testnet_only":false,"mainnet_enabled":true,"spend_enabled":false},"payment":{"x402Version":2,"scheme":"exact","protocols":[{"x402":{}}],"price":{"mode":"fixed","currency":"USD","amount":"0.030000"},"network":"eip155:8453","network_name":"base","currency":"USDC","asset":"Base USDC","amount":"30000","maxAmountRequired":"30000","decimals":6,"price_usd":0.03,"payTo":"0x7e4d786057930b66cb45e2017a587425ebade587","pay_to":"0x7e4d786057930b66cb45e2017a587425ebade587","resource":"https://signalforgestudios.com/x402/email-preflight","maxTimeoutSeconds":1800,"facilitator_url":"coinbase_cdp_authenticated","settlement_accounting":"Signal Forge recognizes paid requests only after a settlement response includes a non-empty transaction hash."},"privacy":"No raw copy, image upload or full generated result is written to request/payment ledgers. Logs retain transaction metadata and response hashes."}