Altcoin Chasers HQ X402 API
The X402 API from Altcoin Chasers HQ — 9 operation(s) for x402.
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OpenAPI Specification
openapi: 3.2.0
info:
title: AltcoinChasersHQ Agent X402 API
version: 1.0.0
description: Paid, cached crypto market data for agents.
contact:
email: altcoinchasercapital@gmail.com
x-guidance: Use a member Bearer key for quota access or x402 aliases for per-call USDC payment. Never send keys in URLs.
x-discovery:
wellKnown: /.well-known/x402
mcp: /mcp
servers:
- url: https://altcoinchasershq.app
description: Production
tags:
- name: X402
paths:
/api/x402/v1/agent/market-sentiment:
get:
summary: Pay per call for market sentiment
description: Current crypto market sentiment snapshot with BTC price, 24-hour change, fear/greed, confidence and source-attributed reasoning. Cached; no input required.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
bias: neutral
btcPrice: null
btcChange24h: null
fearGreedIndex: null
confidence: null
reasoning: []
provenance: AltcoinChasersHQ cached market-sentiment aggregation
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.010000'
protocols:
- x402: {}
operationId: x402MarketSentiment
parameters: []
tags:
- X402
/api/x402/v1/agent/equity-signals:
get:
summary: Pay per call for equity signals
description: Cached daily price and relative-volume activity proxies for MSTR, COIN, CRCL, HOOD and NVDA. These are not actual order-flow or investor-sentiment measurements.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
equities:
- symbol: MSTR
status: available
priceUsd: null
change1dPct: null
change5dPct: null
relativeVolume20d: null
activity: no_volume_confirmation
provenance: Yahoo Finance chart API; price/volume activity proxy
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.010000'
protocols:
- x402: {}
operationId: x402EquitySignals
parameters: []
tags:
- X402
/api/x402/v1/agent/regime:
get:
summary: Pay per call for regime
description: Cached unified risk_on, neutral or risk_off crypto-market regime with rule-based confidence, timestamp, inputs and reasoning.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
regime: neutral
confidence: 50
confidenceMeaning: Rule-based directional strength, not a calibrated probability.
inputs: {}
reasoning: []
provenance: AltcoinChasersHQ market-sentiment aggregation
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.010000'
protocols:
- x402: {}
operationId: x402Regime
parameters: []
tags:
- X402
/api/x402/v1/agent/eth-levels:
get:
summary: Pay per call for eth levels
description: ETH realized volatility and nearby 30-day swing support/resistance from public ETH/USDT daily candles. WETH is treated as ETH-equivalent.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
symbol: ETHUSDT
priceUsd: null
realizedVolatility30dPctAnnualized: null
supportUsd: []
resistanceUsd: []
provenance: Binance public ETH/USDT daily candles
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.010000'
protocols:
- x402: {}
operationId: x402EthLevels
parameters: []
tags:
- X402
/api/x402/v1/agent/market-history:
get:
summary: Pay per call for market history
description: Persisted hourly market-sentiment and regime snapshots retained for 30 days. Sampling starts on first request; historical backfill is not available.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
retentionDays: 30
samplingIntervalMinutes: 60
historicalBackfill: false
observations: []
provenance: Persisted AltcoinChasersHQ market-sentiment snapshots
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.010000'
protocols:
- x402: {}
operationId: x402MarketHistory
parameters: []
tags:
- X402
/api/x402/v1/agent/token-security:
get:
summary: Pay per call for token security
description: Rug-pull and token security lookup for one exact contract, including available liquidity, authority, holder concentration, honeypot and tax flags. Use before buying a new or low-cap token.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data: {}
provenance: GMGN cached token security data
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.050000'
protocols:
- x402: {}
operationId: x402TokenSecurity
parameters:
- name: chain
in: query
required: true
description: Chain of the token.
schema:
type: string
enum:
- sol
- bsc
- base
- eth
- robinhood
description: Chain of the token.
example: sol
- name: address
in: query
required: true
description: Solana base58 mint or EVM 0x contract address.
schema:
type: string
minLength: 20
description: Solana base58 mint or EVM 0x contract address.
example: So11111111111111111111111111111111111111112
tags:
- X402
/api/x402/v1/agent/alpha:
get:
summary: Pay per call for alpha
description: Acai's bounded alpha signal feed with tiered signals and evidence. Use to review early altcoin and memecoin opportunities. Research, not financial advice.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
tier1: []
tier2: []
tier3: []
provenance: AltcoinChasersHQ cached Acai Alpha signals
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.080000'
protocols:
- x402: {}
operationId: x402Alpha
parameters: []
tags:
- X402
/api/x402/v1/agent/prediction-markets:
get:
summary: Pay per call for prediction markets
description: Crypto-relevant prediction-market events and odds with recent market context. Use to gauge crowd expectations for crypto and macro events.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
events: []
provenance: Polymarket Gamma public market data via AltcoinChasersHQ cache
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.050000'
protocols:
- x402: {}
operationId: x402PredictionMarkets
parameters: []
tags:
- X402
/api/x402/v1/agent/perps:
get:
summary: Pay per call for perps
description: Perpetual futures market context from Hyperliquid, including funding and open interest where available. Use to assess positioning and liquidation risk.
security:
- x402: []
responses:
'200':
description: Successful bounded data response
content:
application/json:
schema:
$ref: '#/components/schemas/AgentResponse'
example:
data:
markets: []
provenance: Hyperliquid public read-only market data
asOf: '2026-10-13T23:00:00Z'
'400':
description: Invalid request parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Missing or invalid member API key
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
description: x402 payment required. Decode the PAYMENT-REQUIRED response header to select and authorize one of the offered USDC payment requirements.
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 PaymentRequired payload supplied by Circle Gateway.
schema:
type: string
contentEncoding: base64
content:
application/json:
schema:
type: object
maxProperties: 0
'429':
description: Member daily quota exceeded; Retry-After gives seconds to UTC reset
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
x-payment-info:
price:
mode: fixed
currency: USDC
amount: '0.050000'
protocols:
- x402: {}
operationId: x402Perps
parameters: []
tags:
- X402
components:
schemas:
Error:
type: object
required:
- message
properties:
message:
description: Machine-readable error explanation.
type: string
retryAfter:
description: Seconds until the UTC quota reset when rate limited.
type: integer
AgentResponse:
type: object
required:
- data
- provenance
- asOf
properties:
data:
description: Endpoint-specific bounded market data.
type: object
provenance:
description: Human-readable upstream source attribution.
type: string
asOf:
description: ISO-8601 time at which this data was produced or observed.
type: string
format: date-time
securitySchemes:
memberBearer:
type: http
scheme: bearer
bearerFormat: hq_live API key
description: Paid member API key.
x402:
type: http
scheme: x402
description: Circle Gateway USDC payment.
externalDocs:
url: https://altcoinchasershq.app/agents
description: Agent integration guide