Pricing

The open-source SDK is free forever. Run all 38 verifiers locally with pip install vrdev. No API key, no account needed.

Free During Public Launch|The hosted API is free while we gather feedback. Paid tiers below will activate after the launch period ends.
Beta note: x402 payments currently use Base Sepolia (testnet). Mainnet billing on Base coming soon.

Hosted API pricing

When paid tiers activate, verification costs are charged per call via USDC micropayments on Base (x402 protocol). During beta, payments use Base Sepolia (testnet).

HARD
$0.005 USDC

Deterministic state checks - database rows, file existence, HTTP status codes. Sub-second, no LLM calls.

  • Database row existence & updates
  • File system verification
  • HTTP response matching
  • Git commit checks
  • CSV / JSON / YAML validation
SOFT
$0.05 USDC

Rubric-based LLM judges - content quality, semantic matching, tone analysis. Uses structured prompts for consistency.

  • Text content matching
  • Email content verification
  • Document quality scoring
  • PDF page count checks
  • Structured output validation
AGENTIC
$0.15 USDC

Agent-driven probing - browser automation, calendar event creation, multi-step process verification.

  • Browser state probing
  • Calendar event verification
  • Shell state inspection
  • Multi-step workflow checks
  • End-to-end action confirmation

Composition surcharge

When composing multiple verifiers into a pipeline via /v1/compose, a flat $0.002 USDC surcharge is added on top of the component verifier prices.

How payment works

🔑
Get API Key
Sign up → get API key
📡
API Call
POST /v1/verify
✅
Payment Gate
< 1 000 calls - no charge
🆓
Settlement
$0.00 - open access
FREE✓ Verified - free tier

Graduated access

FREE

Get started instantly

Sign up and create API keys. Your first 1,000 verifications are free. No wallet needed.

TESTNET

Test with play money

Enable testnet billing → pay with testnet USDC on Base Sepolia. Up to 10,000 verifications.

MAINNET

Production scale

Upgrade to mainnet → pay with real USDC on Base. No limits, no invoices.

Get your wallet ready in 3 steps

1

Install a wallet

Download Coinbase Wallet or MetaMask. Add the Base network (auto-detected in most wallets).

2

Get USDC on Base

Bridge USDC from Ethereum via the Base Bridge, or buy directly on Coinbase and withdraw to Base. For testnet, use the Circle faucet.

3

Call the API

When you exceed the free tier, the API returns a 402 with payment headers. Your client signs a USDC transfer and retries; verification completes automatically.

Team billing & invoicing

Need consolidated billing, usage reports, or invoice-based payment for your team? We're building team accounts now.

Free tier

The open-source vrdev Python SDK runs verifiers locally at zero cost. API pricing applies only to the hosted service, which adds evidence anchoring, tamper-proof audit trails, and team dashboards.