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Coin Railz

https://coinrailz.com/a2a/v1
● healthy a2a-agent

Multi-chain x402 micropayment infrastructure for AI agents. 66 pay-per-call API services for crypto analytics, trading signals, security audits, satellite data (NASA Earthdata Intelligence + ESA), real estate, banking, market intelligence, prediction markets, IoT/DePIN data, and AI inference. Native Coinbase Agentic Wallet compatible. OWS (Open Wallet Standard) compatible. Pay with USDC on Ethereum or Base - prices from $0.05 to $10.00 per request.

Category
a2a-agent
Chains
—
Price
$0.2500 USDC / call

Quality grade

How grading works
B 77.7 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 200)
Payability 20.0 / 20
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 17.7 / 40
7 distinct payers, 822 USDC transfers in the last 30 days
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 6 h ago. On-chain activity last read 11 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

Paid endpoints

80 resource(s) advertised by this origin.

https://coinrailz.com/x402/ping

Platform health probe — returns service status, current timestamp, and payment infrastructure readiness. Use as a low-cost connectivity test before calling higher-priced services.

https://coinrailz.com/x402/first-call

START HERE. The canonical first payment endpoint for any AI agent integrating with Coin Railz. Pay $0.05 USDC on Base or Solana and receive a verified onboarding receipt, payment confirmation, and executable templates for the next 3 services. Both EVM and Solana accepted.

https://coinrailz.com/x402/gas-price-oracle

Real-time EIP-1559 gas prices (base fee, priority fee, fast/safe/slow tiers) for Ethereum, Base, Polygon, Arbitrum, and Optimism with USD cost estimates per transaction type.

https://coinrailz.com/x402/instant-agent-wallet

Create a session-scoped ephemeral EVM wallet for AI agent operations. Returns address and encrypted key material with USDC funding instructions. Designed for single-session autonomous use.

https://coinrailz.com/x402/verified-agent-identity

Check whether a wallet owns an ERC-8004 identity NFT on Base mainnet and return an ownership, wallet-activity, and signature status assessment. This service queries existing on-chain records; it does not register an agent, mint an NFT, or write to the IdentityRegistry.

https://coinrailz.com/x402/prediction-market-spread

Live cross-platform spread analysis: Polymarket vs Kalshi for identical real-world events. Returns YES probability divergence, arbitrage opportunity ranking by spread magnitude, matchConfidence, actionHint, and edgeBps per opportunity.

https://coinrailz.com/x402/satellite-earthdata

NASA Earthdata gateway: precipitation, granule search, SST, soil moisture, and ocean color in one endpoint. Specify the product field to select dataset type and coordinates.

https://coinrailz.com/x402/earthdata-precipitation

Real-time observed rain rate at any global coordinate from NASA IMERG. Input: latitude, longitude, and date.

https://coinrailz.com/x402/earthdata-ocean-color

MODIS Aqua ocean chlorophyll-a concentration via NASA CMR at 4km resolution. Input: coordinates or bounding box and date range.

https://coinrailz.com/x402/fire-alerts

Real-time active fire detections from NASA FIRMS (MODIS + VIIRS). Returns fire radiative power, confidence level, and coordinates for any bounding box within the past 24 hours.

https://coinrailz.com/x402/air-quality

Atmospheric pollutant concentrations (NO2, SO2, CO, O3, aerosols) from ESA Sentinel-5P TROPOMI satellite for any global coordinate or bounding box.

https://coinrailz.com/x402/fleet-telematics

Real-time fleet data from IoT-connected vehicles: GPS location, fuel consumption, driver behavior scores, and route efficiency metrics. Requires registered fleet deviceId.

https://coinrailz.com/x402/iot-sensor-reading

Single sensor reading from a registered IoT device: temperature, humidity, pressure, CO2, or motion. Requires a registered deviceId. Returns timestamped value with unit and quality flag.

https://coinrailz.com/x402/ai-inference

Pay-per-call GPT-4o-mini inference via x402 micropayment — no API key required. Supports system prompt, user message, and temperature. Returns completion text.

https://coinrailz.com/x402/b20-token-info

Metadata, total supply, compliance mode, and freeze status for any B20 Native Token Standard token on Base mainnet. Returns ERC-20 fields plus B20-specific compliance fields. Gracefully handles plain ERC-20 tokens.

https://coinrailz.com/x402/robinhood-token-price

Real-time token price and pool data for any token on Robinhood Chain (eip155:4663) via Chainlink SVR feeds. Returns price, 24h change, and top liquidity pool.

https://coinrailz.com/x402/robinhood-dex-pools

Top DEX liquidity pools on Robinhood Chain. Pass a token address for token-specific pools, or omit for chain-wide top pools by liquidity. Includes fee tier, 24h volume, and pool addresses.

https://coinrailz.com/x402/rwa-nav-oracle

Synthetic market-based NAV estimate for RWA tokens (real estate, private credit, tokenized treasuries). Returns current NAV per share, implied yield, and protocol metadata.

https://coinrailz.com/x402/tokenized-yield-compare

Live APY comparison across tokenized RWA protocols: Ondo (USDY), Backed (bIB01), Superstate (USTB), Mountain Protocol (USDM), OpenEden (TBILL), Hashnote (USYC), Maple Finance. Sourced from DeFi Llama.

https://coinrailz.com/x402/token-metadata

Token name, symbol, decimals, total supply, and contract details for any ERC-20 on Ethereum, Base, Polygon, or Arbitrum. Resolves from on-chain state — no centralized API dependency.

https://coinrailz.com/x402/dex-liquidity

Real-time liquidity depth, TVL, price impact, and 24h volume for a token pair across Uniswap V2/V3, Curve, and Aerodrome. Input: token pair + chain.

https://coinrailz.com/x402/approval-manager

Check current ERC-20 allowances and generate unsigned approve() calldata for any spender on any EVM chain. Required pre-step before DEX swaps or DeFi protocol interactions.

https://coinrailz.com/x402/token-price

Token price, 24h change, volume, and market cap from CoinGecko and DEX Screener. Covers 10,000+ tokens including long-tail assets unavailable on major centralized exchanges.

https://coinrailz.com/x402/token-sentiment

Social sentiment score for any token from X/Twitter and Reddit. Returns bullish/bearish ratio, momentum direction, and top discussion themes over configurable time windows.

https://coinrailz.com/x402/transaction-builder

Encode and prepare any EVM transaction: ABI encoding, calldata construction, gas estimation, and nonce lookup for Ethereum, Base, Arbitrum, and Optimism.

https://coinrailz.com/x402/whale-alerts

Recent large-value wallet transfers for any token or address: amount, sender/receiver, exchange flow direction, and historical pattern context. Threshold configurable, defaults to >$50K.

https://coinrailz.com/x402/batch-quote

DEX swap quotes for multiple token pairs in a single call. Returns best route, price impact, gas estimate, and minimum received per pair — reduces round-trips for agents comparing multiple swaps.

https://coinrailz.com/x402/multi-chain-balance

Native token and ERC-20 balances for an EVM wallet across Ethereum, Base, Polygon, Arbitrum, Optimism, and 2 more chains in a single call. Returns balances with live USD values.

https://coinrailz.com/x402/trending-tokens

Top trending tokens ranked by composite score: social volume, price momentum, DEX activity, and whale accumulation patterns. Returns ranked list with 24h stats and risk flags.

https://coinrailz.com/x402/portfolio-tracker

Real-time portfolio value, PnL, and allocation breakdown for any EVM wallet. Aggregates token balances with live USD prices and 24h performance across multiple chains.

https://coinrailz.com/x402/wallet-risk

Multi-factor wallet risk report: sanctions exposure, mixer interactions, darknet market activity, and concentration risk. Returns risk tier (LOW/MEDIUM/HIGH/CRITICAL) with evidence and recommended actions.

https://coinrailz.com/x402/trade-signals

AI crypto trading signals with entry price, stop-loss, take-profit, position size recommendation, and risk/reward ratio. Based on technical indicators and on-chain flow analysis.

https://coinrailz.com/x402/payment-processing

Process USDC payments across EVM chains with automatic routing and fee optimization. Returns transaction receipt, confirmed amount, and destination chain confirmation.

https://coinrailz.com/x402/contract-scan

Smart contract security scan returning a safety score (0-100) and structured vulnerability findings (reentrancy, overflow, access control, logic flaws) for any deployed EVM contract address.

https://coinrailz.com/x402/agent-create-wallet

Create a persistent Coinbase Developer Platform (CDP) managed wallet for AI agents on Base mainnet. Returns wallet address and API credentials for long-running autonomous deployments.

https://coinrailz.com/x402/seamless-chain-bridge

Cross-chain bridge calldata via Across Protocol for Ethereum, Base, Arbitrum, Optimism, and Polygon. Returns unsigned bridge transaction with fee breakdown, estimated settlement time, and minimum received.

https://coinrailz.com/x402/compliance-consultation

Informational technical regulatory-analysis output for DeFi protocols, token launches, and on-chain operations. It is not legal advice or a regulated compliance service.

https://coinrailz.com/x402/smart-contract-audit

AI security audit for Solidity contracts: reentrancy, overflow/underflow, access control, and business logic flaws. Returns severity-ranked findings (CRITICAL/HIGH/MEDIUM/LOW) with line references and remediation guidance.

https://coinrailz.com/x402/property-valuation

AI-powered real estate property valuation using comparable sales, zoning data, and market trends. Returns estimated value range with confidence interval and key value drivers.

https://coinrailz.com/x402/lease-analysis

Commercial lease terms extraction and risk analysis. Returns key clauses (rent escalation, break options, TI allowance), market rate comparison, and red-flag summary.

https://coinrailz.com/x402/construction-progress

Construction site progress assessment using multi-source satellite imagery and AI analysis. Input site coordinates and date range; returns phase classification and change detection report.

https://coinrailz.com/x402/fraud-detection

Informational technical fraud-risk output for an on-chain transaction or wallet. It is not banking, legal, or regulated advice.

https://coinrailz.com/x402/credit-risk-score

Informational technical on-chain risk score for an EVM wallet. It is not credit underwriting, lending, banking, or regulated advice.

https://coinrailz.com/x402/compliance-check

Informational technical wallet-risk output based on configured data sources. It is not legal advice, a banking service, or a regulated compliance determination.

https://coinrailz.com/x402/sentiment-analysis

Aggregated market sentiment for any crypto asset from X/Twitter, Reddit, and news sources. Returns bullish/bearish score (0-100), momentum signal, and 24h sentiment delta.

https://coinrailz.com/x402/trading-signal

Technical analysis signals — RSI, MACD, Bollinger Bands, volume profile, and trend strength — for any crypto pair. Returns buy/sell/hold verdict with confidence interval and key price levels.

https://coinrailz.com/x402/portfolio-optimization

AI crypto portfolio rebalancing using Modern Portfolio Theory. Input current holdings and risk tolerance; returns target allocation with projected Sharpe ratio and expected return improvement.

https://coinrailz.com/x402/correlation-matrix

Price correlation matrix for up to 10 crypto assets over 7/30/90-day windows. Returns Pearson coefficients to identify diversification gaps and correlated risk in a portfolio.

https://coinrailz.com/x402/risk-metrics

Portfolio risk metrics: Value at Risk (95%/99% confidence), Sharpe ratio, max drawdown, and Sortino ratio for any token or portfolio, based on historical price data.

https://coinrailz.com/x402/arbitrage-scanner

Scan for real-time arbitrage opportunities across Uniswap, Curve, and Balancer. Returns path, estimated gross profit, gas cost, and net yield per opportunity.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://coinrailz.com/x402/ping
/.well-known/x402.json
https://coinrailz.com/.well-known/x402

Listed in

Directories this entry was found in.

a2a