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2s Crypto API

The crypto API from 2s — 46 operation(s) for crypto.

2s Crypto API is one of 114 APIs that 2s publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Crypto. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

This API exposes 46 operations across 46 paths, and defines 3 schemas. It is described by OpenAPI 3.2.0, at version 1.

Requests are made against a single base URL, https://2s.io.

46 operations 46 paths 3 schemas 45 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1
Base URL
https://2s.io/mcp
Authentication
API Key
Contact
Resource Areas
1

Authentication & Security 1

2s Crypto API declares 1 security scheme for authenticating requests. An API key is passed in the header as PAYMENT-SIGNATURE (x402Payment).

  • x402Payment — x402 protocol v2: base64-encoded PaymentPayload. Call any paid endpoint without auth to receive a 402 with a multi-network PaymentRequirements envelope. Sign f…

Paths & Operations 46

Across 46 paths, the API surfaces 46 operations — 45 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

Crypto 46
GET
/api/crypto/address-history
Transaction history for an Ethereum address (via Etherscan V2)
crypto_address-history 8 params → 200400402405500502
GET
/api/crypto/address-safety
Malicious-wallet screen (via GoPlus, free/keyless)
crypto_address-safety 3 params → 200400402405500502
GET
/api/crypto/address-screen
Sanctions-screen a crypto wallet address against the US
crypto_address-screen 2 params → 200400402405500502
GET
/api/crypto/address-validate
Validate a cryptocurrency address with full checksum
crypto_address-validate 3 params → 200400402405500502
GET
/api/crypto/balances
Live native + ERC-20 token balances for an EVM address
crypto_balances 4 params → 200400402405500502
GET
/api/crypto/btc-address
Bitcoin address summary (free/keyless): confirmed balance
crypto_btc-address 2 params → 200400402405500502
GET
/api/crypto/btc-fees
Current Bitcoin network fee rates and mempool backlog from
crypto_btc-fees 1 param → 200400402405500502
GET
/api/crypto/btc-mempool
Bitcoin mempool state (free/keyless): current unconfirmed
crypto_btc-mempool 2 params → 200400402405500502
GET
/api/crypto/btc-tx
Bitcoin transaction lookup by txid (free/keyless)
crypto_btc-tx 2 params → 200400402405500502
GET
/api/crypto/btc-utxos
Unspent transaction outputs (UTXOs) for a Bitcoin address
crypto_btc-utxos 3 params → 200400402405500502
GET
/api/crypto/cex-klines
Centralized-exchange OHLCV candlesticks for a spot trading
crypto_cex-klines 4 params → 200400402405500502
GET
/api/crypto/cex-ticker
Centralized-exchange 24h ticker for a spot pair (e.g
crypto_cex-ticker 2 params → 200400402405500502
GET
/api/crypto/chain-tvl-history
Historical total DeFi TVL time series for a blockchain (e.g
crypto_chain-tvl-history 3 params → 200400402405500502
GET
/api/crypto/coin
Full coin profile by CoinGecko id (e.g
crypto_coin 2 params → 200400402405500502
GET
/api/crypto/coin-history
Historical market chart for a coin by CoinGecko id
crypto_coin-history 4 params → 200400402405500502
GET
/api/crypto/contract
Decode an EVM smart contract
crypto_contract 4 params → 200400402405500502
POST
/api/crypto/decode-calldata
Decode raw EVM transaction calldata
crypto_decode-calldata 1 param body → 200400402405500502
GET
/api/crypto/defi
DeFi total-value-locked (TVL) metrics via DefiLlama
crypto_defi 4 params → 200400402405500502
GET
/api/crypto/defi-chains
DeFi TVL leaderboard across all chains (via DefiLlama
crypto_defi-chains 2 params → 200400402405500502
GET
/api/crypto/defi-fees
Protocol fees/revenue or DEX trading volume leaderboards
crypto_defi-fees 4 params → 200400402405500502
GET
/api/crypto/defi-protocol-history
Historical total-value-locked (TVL) time series for a DeFi
crypto_defi-protocol-history 3 params → 200400402405500502
GET
/api/crypto/defi-yields
DeFi yield & lending rates across protocols (via DefiLlama
crypto_defi-yields 8 params → 200400402405500502
GET
/api/crypto/dex-networks
List the 100+ blockchain networks supported by the on-chain
crypto_dex-networks 2 params → 200400402405500502
GET
/api/crypto/dex-ohlcv
OHLCV candlesticks for a DEX pool (via GeckoTerminal
crypto_dex-ohlcv 6 params → 200400402405500502
GET
/api/crypto/dex-pools
Trending or newly-created DEX liquidity pools on a network
crypto_dex-pools 4 params → 200400402405500502
GET
/api/crypto/dex-search
Search on-chain DEX liquidity pools by token name, symbol
crypto_dex-search 4 params → 200400402405500502
GET
/api/crypto/dex-token-pools
All DEX pools trading a given token, by contract address
crypto_dex-token-pools 4 params → 200400402405500502
GET
/api/crypto/ens-resolve
Resolve ENS (Ethereum Name Service) names and addresses
crypto_ens-resolve 2 params → 200400402405500502
GET
/api/crypto/fear-greed
The Crypto Fear & Greed Index - a 0-100 market-sentiment
crypto_fear-greed 2 params → 200400402405500502
GET
/api/crypto/gas-oracle
Live EVM gas oracle. Returns latest block baseFeePerGas +
crypto_gas-oracle 2 params → 200400402405500502
GET
/api/crypto/global
Whole-crypto-market overview: total market cap (USD), total
crypto_global 1 param → 200400402405500502
GET
/api/crypto/hyperliquid-funding
Live perp funding rates, open interest, and mark/oracle/mid
crypto_hyperliquid-funding 4 params → 200400402405500502
GET
/api/crypto/hyperliquid-predicted-funding
Predicted next funding rates per coin across venues
crypto_hyperliquid-predicted-funding 3 params → 200400402405500502
GET
/api/crypto/kimchi-premium
The "kimchi premium" - how much higher a crypto asset
crypto_kimchi-premium 2 params → 200400402405500502
GET
/api/crypto/markets
Top cryptocurrencies by market cap with live price, market
crypto_markets 2 params → 200400402405500502
GET
/api/crypto/nft
Live ERC-721 NFT read (Base, Ethereum, Polygon, Arbitrum
crypto_nft 5 params → 200400402405500502
GET
/api/crypto/nft-security
NFT collection risk screening via GoPlus (free, keyless)
crypto_nft-security 3 params → 200400402405500502
GET
/api/crypto/stablecoins
Stablecoin supply leaderboard (via DefiLlama
crypto_stablecoins 2 params → 200400402405500502
GET
/api/crypto/token-info
On-chain token metrics by contract address (via
crypto_token-info 3 params → 200400402405500502
GET
/api/crypto/token-metadata
Live on-chain token metadata for an ERC-20 or ERC-721
crypto_token-metadata 3 params → 200400402405500502
GET
/api/crypto/token-price
Current spot price and market data for crypto assets
crypto_token-price 3 params → 200400402405500502
GET
/api/crypto/token-safety
Token honeypot & rug-pull risk screen (via GoPlus
crypto_token-safety 3 params → 200400402405500502
GET
/api/crypto/token-transfers
ERC-20 token transfer history for an Ethereum address (via
crypto_token-transfers 7 params → 200400402405500502
GET
/api/crypto/trending
The most-searched trending cryptocurrencies on CoinGecko
crypto_trending 1 param → 200400402405500502
GET
/api/crypto/tx
Live EVM transaction status and receipt lookup
crypto_tx 3 params → 200400402405500502
GET
/api/crypto/vrf
Verifiable random function - deterministic, publicly
crypto_vrf 2 params → 200400402405500502

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are X402PaymentRequiredV2 (5 properties), Source (3 properties). Each schema is shown below with its type and property counts.

X402PaymentRequiredV2
object
x402 v2 PaymentRequired envelope. Pick any entry from accepts[], sign for that rail, retry with the PAYMENT-SIGNATURE header.
5 properties 2 required
Source
object
Provenance of the data: upstream provider, source URL, and license.
3 properties
CallMeta
object
Per-call meta envelope — endpoint id, cost, caller kind, settlement details.

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

2s-io-crypto-api-openapi.yml Raw ↑

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Where this information came from

This is an independent, third-party profile of 2s Crypto API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

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