Per-call pricing.
In USDC. On Base.
Seven tools, each priced against rediscovery cost. Generic vector search starts at $0.01. The three daily-snapshot slices (CVEs, papers, frontier AI releases) cost more because they're more expensive to skip. No subscriptions, no seats, no enterprise dance.
Per-tool pricing
| Tool | Price | When to call |
|---|---|---|
fillin_query |
$0.01 | Generic post-cutoff vector search across all corpora |
fillin_answer |
$0.02 | Synthesized 150-250 word answer with inline citations (Haiku 4.5 server-side) |
query_cves |
$0.02 | Daily snapshot: NVD + GitHub Security Advisories + OSV |
query_papers |
$0.03 | Daily snapshot: HuggingFace daily papers + bioRxiv ∪ arXiv |
query_frontier |
$0.05 | Daily snapshot: OpenAI/Anthropic/DeepMind/Meta/Mistral + HF trending models |
fillin_stats |
free | Corpus stats — rows, sources, freshness |
fillin_health |
free | Liveness + freshness, no auth |
Try before you pay
Two free paths, no card and no wallet:
- →
POST /v1/probe— one free query per IP per UTC day,k=1. Use to verify retrieval quality before depositing. - → /signup — 20-query trial bearer key, ~24h to issue. Same MCP server, same tools.
Pick your rail
- Sign EIP-191 nonce, pay USDC, get answer — under 1s
- Agents discover via
/agents.json+/v1/payment/info - No KYC, no card, no email
- Auto-refund on server error
- One handshake per call; per-route price applies
- Buy credits with a card, get a bearer key by email
- Drop
Authorization: Bearer …in your MCP config - $5 / $20 / $100 / custom
- Volume discount above 50K calls — email us
- Stripe checkout integration in progress
- Clone the repo, run
uvicorn api:app - Bring your own embedding model + corpus
- Bearer auth only (no x402 facilitator on your side)
- Best for proprietary corpora (legal, internal docs, etc.)
- Same MCP server, same seven tools
Why these prices?
Each tool is priced against the cost of rediscovery — what an agent would have to spend (in tokens, latency, and risk) to re-scrape and re-embed the same information itself. fillin_query at $0.01 sits below the threshold where an agent would escalate the spend to a human. CVE and frontier AI releases cost more because being a day late on either is worth more than a penny.
What's included in every paid call?
- → Up to 20 ranked results, all post-cutoff
- → Full provenance (source, URL, published_at)
- →
top_score+corpus_matchsignal so agents can skip follow-up paid calls when retrieval is weak - → 30 req/min rate limit per identity, per route
- → Indefinite credit lifetime (no expiry)
- → No data retention beyond rate-limit counters
FAQ
Is there a free tier?
Two: POST /v1/probe gives every IP one free k=1 query per UTC day, and /signup mints a 20-query trial bearer key (no card, no wallet). Past those, deposit USDC or buy bearer credits.
Refunds?
Server-side errors auto-refund the credit (x402) or roll back the deduction (bearer). For Stripe purchases, full refund within 14 days, no questions.
SLA?
Best-effort uptime at v0 — see /status for current health. We'll publish an SLO when usage justifies it.