Pay-per-use token metadata for Ethereum via x402 micropayments on the Silverback DeFi API.
What it does
The Silverback x402 API provides DeFi intelligence and execution endpoints accessible via the x402 micropayment protocol. This specific endpoint (`/api/v1/token-metadata/ethereum`) is intended to return token metadata for Ethereum, though it is not explicitly documented in the OpenAPI spec provided by the server. The broader Silverback platform offers 11 paid endpoints covering swap execution, technical analysis, DeFi yield intelligence, arbitrage scanning, token security audits, whale tracking, wallet portfolios, pool analysis, swap quotes (Base and Solana via Jupiter), and holder analytics.
Payments are settled in USDC on Base, Solana, or SKALE, with an optional 15% discount when paying with the $BACK token via Permit2 on Base. Pricing ranges from $0.01 per call for analysis endpoints (pool-analysis, swap-quote, jupiter-quote, holder-analytics) up to $0.05 for swap execution. Based on the pricing tiers documented, token metadata likely falls in the $0.01–$0.02 range, but the exact price for this endpoint is not confirmed.
During probing, this specific endpoint returned HTTP 404 on both GET and POST, which means it may have been renamed, removed, or requires a different path format. The root landing page at x402.silverbackdefi.app is live (HTTP 200) and the OpenAPI spec is well-documented for the other 11 endpoints. Agents should verify this endpoint's availability before relying on it, or consider using the documented endpoints instead.
Capabilities
Use cases
- —Retrieving metadata (name, symbol, decimals, logo) for Ethereum tokens
- —Enriching DeFi agent workflows with token identification data
- —Building dashboards that display token information alongside market data
Fit
Best for
- —AI agents needing on-chain token metadata without API keys
- —Pay-per-call DeFi data access with no subscription
- —Autonomous agents operating in the x402 micropayment ecosystem
Not for
- —High-frequency bulk token metadata lookups (pay-per-call cost adds up)
- —Users who need free or subscription-based token metadata (CoinGecko, Etherscan APIs may be more suitable)
- —Non-crypto use cases
Quick start
# This endpoint returned 404 during probing. Try the documented endpoints instead:
curl -X POST https://x402.silverbackdefi.app/api/v1/token-audit \
-H 'Content-Type: application/json' \
-d '{"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "chainId": 8453}'Endpoint
Quality
The specific /api/v1/token-metadata/ethereum endpoint returned 404 on both GET and POST, and it is not listed in the OpenAPI spec. The broader Silverback platform is live with good documentation for its other 11 endpoints, but this particular endpoint appears unavailable or undocumented.
Warnings
- —Endpoint returned HTTP 404 on both GET and POST — may be removed, renamed, or require a different path format
- —This endpoint is NOT listed in the Silverback OpenAPI spec which documents 11 other endpoints
- —No schema, pricing, or response format available for this specific endpoint
- —The /docs path also returns 404 (Cannot GET /docs)
Citations
- —Silverback provides 11 pay-per-use DeFi intelligence endpoints via x402 micropaymentshttps://x402.silverbackdefi.app
- —Payments accepted in USDC on Base, Solana, or SKALE with 15% discount for $BACK tokenhttps://x402.silverbackdefi.app
- —Pricing tiers range from $0.01 (analysis) to $0.05 (execution)https://x402.silverbackdefi.app
- —The /api/v1/token-metadata/ethereum endpoint returned 404 on POST and GEThttps://x402.silverbackdefi.app/api/v1/token-metadata/ethereum