saylorinnovations.com/api/evm/optimism/balance/:address

caution grade C x402 endpoint Solana Base Polygon Arbitrum found on CDP Bazaar found on thirdweb templated confidence 0.44
https://saylorinnovations.com/api/evm/optimism/balance/:address
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This resource URL still contains an unresolved template placeholder (e.g. {slug}, :slug or %7B…%7D), so the literal URL can't be paid as-is. Substitute a real parameter value before paying. Our health metrics (uptime, latency, spec-compliance) are still measured correctly and apply to the resolved URL. Price and pay-to may vary per item; that per-item variance carries no stability or hijack penalty. This is a per-item endpoint: we saw 2 distinct pay-to wallets over 30 days (one per item/author is expected, not a hijack). Always pay the pay-to in the live 402 quote, not a cached listing.

Advertised descriptionEVM Wallet Balances (optimism). Optimism ERC-20 token balance and native ETH balance for any wallet: up to 20 ERC-20 tokens (?tokens=) in one call, with symbols, decimals and human-readable amounts. Live chain head.(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
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Limited data. We have not probed this endpoint enough in the last 30 days to characterize it reliably. Treat the grade below as provisional.
30-day uptime
—
not probed
Avg latency (EU)
—
Confidence
0.44
full-density score
Advertised price
—
not advertised
Price stability
Stable
last 30 days
Probes (30d)
—
full record · up to 48/day
More details ▾
Endpoint ID156832
Pay on Solana$0.003 USDC · to 7LSjfr…acy7 ↗
Pay on Solana3000 units of Es9vMF…wNYB · to 7LSjfr…acy7 ↗
Pay on Base$0.003 USDC · to 0xA2A8…c8aa ↗
Pay on Polygon3000 units of 0x3c49…3359 · to 0xA2A8…c8aa ↗
Pay on Arbitrum3000 units of 0xaf88…5831 · to 0xA2A8…c8aa
Pay on Solana23910 units of So1111…1112 · to 7LSjfr…acy7 ↗
Pay-to (30d)varies across 2 wallets (per-item endpoint)
First seen2026-09-24
Last probed2026-10-02
Statuslisted
Snapshot computed2026-10-02 23:34 UTC (free snapshot, recomputed at least every 24h)
↑ 10 better alternatives available

10 better-scored endpoints serving a semantically similar purpose exist.

We don't reveal which ones here. The ranked list (resource URLs, exact scores, prices & similarity, etc...) is one paid call away. Purchase it right here with a browser wallet, no code required:

A wallet payment page opens first; approve the USDC payment and the ranked JSON list loads right in your browser. Agents use the x402_find_alternatives MCP tool or POST /v1/similar directly.

Why this verdict?2 warnings
A wallet payment page opens first; approve the USDC payment and the full JSON report loads right in your browser. Want a taste first? Read a free full sample report.
This page is the free cached snapshot (computed 7 hours ago, refreshed at least every 24h). Here's what the paid API adds.
  • ✓Live re-probe at decision time
    The score is computed the moment you ask, not up to 24h ago.
  • ✓Instant snapshot refresh
    Every paid call rewrites this page, the badge and the card immediately.
  • ✓The full “why”, machine-readable
    Confidence band, component breakdown, every risk flag with its evidence.
  • ✓On-chain settlement proof
    Real USDC volume and distinct payers behind the pay-to wallet.
  • ✓90-day raw history
    Every listing, price and payTo change, every probe result.
  • ✓Ranked better alternatives
    Higher-scored endpoints serving the same function, when they exist.
  • ✓Change & liveness alerts
    PayTo/price moves, spec regressions, downtime; 5-minute probes while watched.
$npx -y x402-trust-mcpGive your agents the tools to do all of this for you, with one install. Agents use the x402_trust_score MCP tool or POST /v1/x402-trust directly (pay-per-call over x402, from $0.005).