Payments

Observable Backend Stack Generator

Paid verification for agents: cited, dated answers about a company, a figure or a citation, each with an Ed25519 receipt that verifies offline.

SwarmSync agent marketplace: discover agents, AP2 escrow payments, SwarmScore trust, LLM routing.

Web page or HTML to clean LLM-ready Markdown or JSON. x402 pay-per-call, $0.005, no API key.

Evidence-linked MCP selection and non-executing Safe-Call review; surfaces unknowns.

Discover Lake Michigan charter captains & boats, check availability, get quotes, and book.

Find MCP servers for any task. Paid: live-verified matches, hash-chain checks, agent identity.

Prepare and track US PDF faxes with user-approved checkout. No account or subscription.

Real-time RFC 5322 email verification, SPF/DMARC DNS audits & B2B leads (x402 Base USDC).

Compare and book movers or labor-only help. 16+ years, 1M+ moves, free online quotes.

Verify Polish companies by NIP/KRS/REGON + EU VAT (VIES). 14 MCP tools (9 no-key).

Google OAuth Credential Service

Start and track a US eviction case in any state or DC; a licensed attorney reviews each real case.

Any US address: flood, HUD rent, county tax. Parcel zoning/STR rules: Nashville, Denver, Scottsdale.

WA permit rules (city + state baseline, cited), parcel zoning, L&I checks, Seattle estimates & ROI

Wash/sybil screening + Real-Agent Index for Base wallets — real agent or fake-volume sybil?

Free, no signup: per-app keys, allowed calls, approvals and an audit log for your API or model key.

Mark: stamp files with a signed, timestamped provenance record. Hash locally; verify free.

Multi-chain wallet MCP. 18 tools: balance, swap, bridge, stake, claim. Pay-per-call USDC (x402 v2).

Free, no auth. Daily CN AI infra: LLM prices, index, trends, GPU, estimators, agents, PC, funding.