Fresh402 3.1.0 — complete intelligence workflows for autonomous AI agents.
Canonical API: https://api.fresh402.com
Canonical MCP: https://api.fresh402.com/mcp
Supported legacy origin: https://fresh402.kirilllabs.workers.dev
Registry identity: io.github.kirillradchenko96/fresh402; catalog revision 3.1.2.
Twelve tools via MCP: free Register, four complete server workflows and seven focused paid primitives.

Walletless first Check: inspect root instant_evaluation.enabled, then POST /v1/check with {"url":"https://example.com/","evaluation":true}. No wallet, key or SDK is required. Shared finite eligibility applies; no automatic payment follows exhaustion. Read https://fresh402.com/docs#instant-evaluation before signed-trial enrollment.

## Complete server workflows
- Website Change Intelligence: /v4/workflows/website-change-intelligence; fresh402_website_change_intelligence; $0.005 native USDC / 2 eligible credits.
- API Compatibility Review: /v4/workflows/api-compatibility-review; fresh402_api_compatibility_review; $0.010 / 4.
- On-chain Evidence Brief: /v4/workflows/onchain-evidence-brief; fresh402_onchain_evidence_brief; $0.025 / 10.
- Cross-domain Release Evidence: /v4/workflows/cross-domain-release-evidence; fresh402_cross_domain_release_evidence; $0.040 / 16.
One fixed parent charge per workflow; no internal sub-charges. Workflow prepaid tariff 5 requires eligible finalized credits and constituent scope rights. These workflows are excluded from walletless, human and machine trials.
First document observation seeds in the charged operation; later owned observations compare previous or baseline. New unchanged observations carry the fixed price. Original replay performs no fresh work or charge. Workflow observation IDs are not primitive watch IDs; owned state and original results have bounded seven-day retention.

## Start and integrate
- Choose a workflow: https://fresh402.com/workflows
- Task guide: https://fresh402.com/use-cases
- Current inputs, state and recovery: https://github.com/kirillradchenko96/fresh402/blob/main/docs/SERVER_WORKFLOWS.md
- Complete Node SDK setup: https://fresh402.com/docs#sdk
- SDK release and public npm verification: https://github.com/kirillradchenko96/fresh402/blob/main/docs/SDK_PACKAGE.md
- Hosted observations and structured evidence: https://fresh402.com/docs#value
- All tool schemas: https://api.fresh402.com/openapi.json
- Twelve-tool reference: https://fresh402.com/docs/tools
- Plans and prices: https://fresh402.com/pricing
- Account: https://api.fresh402.com/account
- Security: https://fresh402.com/security
Install npm fresh402-sdk@0.6.0-rc.1 or @next; latest remains 0.4.0-rc.1. Node 24+, ESM, declarations, zero runtime dependencies. Source-client compatibility 0.3.6 is separately versioned. SDK import, discovery and quotes never authorize execution or signing.

## Focused tools and access
Free Register creates a reusable public-document baseline within rate/fetch limits; same URL/rules reuses the watch without refreshing.
Check $0.005 / 2 credits; Extract $0.010 / 3; Smart Diff $0.015 / 4; OpenAPI Contract Diff $0.020 / 5. Web tariff 3. Contract Watch $0.010 / 4; Wallet Watch $0.020 / 8; Token Facts $0.010 / 4. Base tariff 4.
Contract Watch and Token Facts are bounded production capabilities. Wallet Watch is a restricted selected-block pilot, not complete wallet history. Base 8453 only, finalized single-provider evidence; no trading, safety score or independent-provider consensus.
Starter All-Services starter-all-services-v4: $2.50 / 1,000 credits. Developer developer-all-services-v4: $15 / 10,000 credits. One-time purchases; purchased credits do not expire. Before funding, accept the current All-Services terms and exact live /v3/prepaid/all-services digest. Existing Web credits and service-specific grants retain their original rights; no automatic entitlement upgrade. Full Base/workflow access requires eligible finalized funding.

## Free first use
Inspect root instant_evaluation.enabled before Check {"url":"https://example.com/","evaluation":true}. One attempt per verified network prefix per approved period, sharing finite capacity. No wallet, API key, custom header or proprietary SDK. Exact replay returns retained evidence; 429 never authorizes payment.
Machine trial /v3/agent-trial uses an unfunded EOA EIP-191 ownership message without CAPTCHA; up to 100 Checks (20/day) and bounded original-tool samples when eligible. Maximum credential lifetime 30 days, clipped to live eligibility; inspect actual returned expiry. Existing identities retain original allowance and expiry. Shared Web limits remain 500 attempts/day, 10,300/period, 50 new identities/day, 10/network/day, 1,000 profiles. Separate Base samples share 18 RPC/day and 18,000 units/month; no complete bundle is guaranteed. Use the private trial key and persisted per-call Idempotency-Key; no payment fallback.
Human Web trial /v2/trial independently requires ownership signing and human verification. Read actual live availability, quota and credential expiry; no fixed historical date here extends or overrides them.
Human Web trials do not cover blockchain. Separate machine blockchain samples share the shared 18 RPC/day cap; Web trial capacity does not enlarge it.

## Payments and original recovery
Native USDC on Base 8453: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. Active Safe merchant: 0xFAC492A8D7843C9aFCCa6A1691BCCB5425ab14F3 (1-of-1, not escrow). Verify exact current amount, recipient and resource before explicit x402/MPP authorization. Circle Gateway remains disabled. Prepaid uses an existing private API key and finite cap. Preserve exact original input, key/proof and private recovery token; no replacement authorization after uncertainty. Recover origin-bound operations through their original origin; never rewrite signed resource URLs.
Historical operations retain their original recipient and original payment requirements; current discovery never rewrites an earlier authorization.

## Measured coding-agent value
Website Change Intelligence showed 30.9% lower paired-median two-task total cost at Developer-equivalent pricing versus implementing the scoped pipeline with GPT-6.1 Sol: 3 matched pairs, 2 favored Fresh402. Exploratory Astra Website 45.1% and API 42.9%: one pair each, not general guarantees. Forty-seven of 48 planned actual-model sessions completed; full retained results and method: https://fresh402.com/agent-efficiency and https://fresh402.com/agent-efficiency-results.json . Historical client-orchestrated benchmarks are separate from current server products.

## Boundaries
Public static HTTPS only; no browser rendering, authenticated/private fetch, linked-page crawl, automatic scheduler, server-side LLM inference, universal contract compatibility, full chain index or causal/deployment proof. Retained observations, structured evidence and original recovery let agents reuse useful context across sessions. Capacity, source and provider limits remain finite.
Executed staging result excerpts: https://fresh402.com/workflow-examples.json

Native Circle USDC on Solana Mainnet is an explicitly selected x402 alternative at the same service prices. Base remains first and MPP stays Base-only. The observed blockchain remains Base. Read root payment_networks and actual unpaid quotes. Solana mint EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v; merchant 9apNBNbDHZZ2isBEq9ZCnipvRdxAh6ZCBRJPqWQ5Rwuj. Solana ownership uses exact Ed25519 signMessage; no Base wallet is required. Packages require finalized native-USDC evidence; no provisional Solana credits. Preserve original payment network/origin/proof/input and private recovery capability. Details: https://github.com/kirillradchenko96/fresh402/blob/main/docs/SOLANA_USDC.md