What does the KepAIx API provide?

KepAIx provides structured educational market intelligence through JSON endpoints that may include market regime context, signals, liquidity context, derivatives context, confidence, uncertainty, evidence, timestamps, versions, and explicit limitations.

Which KepAIx APIs are free?

KepAIx provides public discovery endpoints for evaluation, testing, educational use, and lightweight integrations. The verified free products are the Main Brain Snapshot API, Market Regime API, Liquidity Lite API, and Derivatives Intelligence API.

What happens without payment on an x402 endpoint?

A request to a KepAIx payment-gated x402 endpoint without valid payment returns HTTP 402 Payment Required with payment instructions.

Is there a free crypto market API?

Yes. KepAIx offers free JSON APIs for market regime, broad market context, liquidity, and derivatives intelligence without a traditional API key or monthly subscription.

Can AI agents use the KepAIx cryptocurrency API?

Yes. KepAIx publishes OpenAPI 3.1 and llms.txt discovery resources, stable JSON structures, explicit limitations, and optional x402 payment access for compatible AI agents.

Free Crypto APIs + Pay-Per-Use x402 Intelligence

Crypto Market Intelligence API
Free JSON Data For Developers And AI Agents

Q: Is KepAIx financial advice?

No. KepAIx provides educational market intelligence and does not provide financial, investment, trading, tax, or legal advice.

Market Regime, Direction, Confidence, Liquidity And Derivatives

Build dashboards, research tools, educational applications, and AI-agent workflows with live cryptocurrency market intelligence from KepAIx. Start with free JSON APIs for broad market direction, confidence, liquidity, and derivatives context. Machine clients can unlock three pay-per-request x402 resources for 0.01 or 0.02 USDC. People can purchase a separate plain-English ATLAS report for 0.10 USDC. No monthly subscription is required.

Every response is structured for software while remaining understandable to people. KepAIx preserves timestamps, confidence, uncertainty, evidence boundaries, and educational limitations. KepAIx provides educational market intelligence only—not financial, investment, or trading advice—and does not expose proprietary formulas, weights, heuristics, normalization, or internal reasoning methods.

Copy API Examples AI Agent Quick Start

Response FormatStructured machine-readable JSON

Public AccessFour verified free v1 JSON APIs

Premium AccessThree machine APIs + one human report

Trust ModelConfidence, uncertainty, and limitations

AI Agent Quick Start

Read OpenAPILoad the authoritative JSON specification at /openapi.json.

Read llms.txtReview the concise machine discovery map and educational boundaries.

Open Reference ClientInspect the production browser implementation and its complete x402 payment flow.

Call A Free APIStart with Market Regime or Main Brain Snapshot to inspect live JSON and preserve its context.

Use x402Request a premium endpoint when the client supports HTTP 402 payment flows and safe wallet signing.

Recommended First Requests

GET https://kepaix.com/api/market-regime.php
GET https://kepaix.com/api/main-brain.php
GET https://kepaix.com/api/liquidity-lite.php
GET https://kepaix.com/api/derivatives.php

Current API And Discovery Status

API Catalogv1.3.1

OpenAPI3.1.0

JSON SpecStable

YAML SpecStable

UpdatedAugust 23, 2026

Start Integrating

Verified Product DirectoryReview four core free APIs, three direct x402 APIs, and the separate human ATLAS report. Response ExamplesInspect representative JSON structures from verified products. Machine DiscoveryUse OpenAPI and llms.txt resources for tools and AI agents. x402 AccessUnderstand HTTP 402 behavior, payment requirements, and settlement flow. Reference ImplementationsInspect the production browser client and complete x402 payment workflow. Main Brain SnapshotOpen the broad free public intelligence snapshot.Opens JSON in a new window Market RegimeOpen a focused free public market-regime response.Opens JSON in a new window Liquidity LiteInspect lightweight educational liquidity context.Opens JSON in a new window Derivatives IntelligenceInspect free derivatives-oriented educational context.Opens JSON in a new window

Compare KepAIx Crypto APIs

API	Access	Best For	What It Provides
Market Regime API	Free	Fast market overview	Current market mode, state, confidence, summary, freshness, and limitations.
Main Brain Snapshot API	Free	Broad crypto market context	Published direction, regime, confidence, tracked-asset context, and aggregate educational performance.
Liquidity Lite API	Free	Liquidity and market structure	Lightweight asset-level liquidity context, breadth, verification status, and source limitations.
Derivatives Intelligence API	Free	Futures and pressure context	Funding, open-interest, liquidation, confidence, evidence, and limitations where available.
x402 Market Regime	0.01 USDC per use	Expanded market-regime analysis	Protected pay-per-use educational market intelligence after x402 settlement.
x402 Main Brain	0.01 USDC per use	Broader structured market context	Protected Main Brain intelligence for developers, applications, and AI agents.
ATLAS Structured Intelligence	0.02 USDC per use	Deeper machine-readable context	Protected multi-layer educational synthesis for compatible x402 clients.
ATLAS Premium Human Report	0.10 USDC per report	Plain-English browser report	Human-facing educational report with payment proof and readable presentation.

Copy-And-Paste Crypto API Examples

No API Key Required For Free Endpoints These examples request the free Market Regime API. Replace the URL with another free KepAIx endpoint when your application needs broader market, liquidity, or derivatives context.

cURL

curl --fail --silent \
  "https://kepaix.com/api/market-regime.php"

JavaScript

const response = await fetch(
  "https://kepaix.com/api/market-regime.php"
);
if (!response.ok) throw new Error(`HTTP ${response.status}`);
const data = await response.json();
console.log(data);

Python

import requests

response = requests.get(
    "https://kepaix.com/api/market-regime.php",
    timeout=15,
)
response.raise_for_status()
data = response.json()
print(data)

PHP

<?php
$url = "https://kepaix.com/api/market-regime.php";
$json = file_get_contents($url);
if ($json === false) {
    throw new RuntimeException("API request failed");
}
$data = json_decode($json, true, 512, JSON_THROW_ON_ERROR);
print_r($data);

Reference Implementations

Production-Verified Developer Examples KepAIx reference implementations demonstrate how documented APIs, HTTP 402 payment requirements, wallet signing, verification, settlement, and protected JSON responses work together in real applications.

Browser Reference Implementation

A production-verified browser-native x402 client deployed at /x402-buyer/. Its default path purchases the 0.10 USDC human ATLAS report, while ?product=agent opens the 0.02 USDC structured ATLAS reference flow.

Production Verified Pera Wallet x402 v2

Open Browser Demo

Shared Purchase Architecture

The client loads the selected product configuration, validates its HTTP 402 challenge, confirms network, asset and exact amount, requests wallet signing, submits payment proof, and receives the selected protected response.

Reference Client Features

Product selection, wallet connection, session restoration, challenge decoding, exact-price validation, transaction signing, facilitator verification, settlement details, payment proof, explorer links, and error handling.

Security Boundary

KepAIx does not receive or store private keys. Pera Wallet signs the transaction, while the protected endpoint verifies payment before returning educational intelligence.

SelectChoose the human or agent ATLAS path

WalletConnect Pera Wallet

HTTP 402Receive payment requirements

ApproveSign the exact USDC payment

VerifyFacilitator verifies payment

SettlePayment settles on MainNet

Protected JSONReceive live KepAIx intelligence

Live Reference Client

Human report browser: https://kepaix.com/x402-buyer/
Agent JSON browser: https://kepaix.com/x402-buyer/?product=agent
Market Regime: https://kepaix.com/api/x402-market-regime.php
Main Brain Premium: https://kepaix.com/api/x402-main-brain.php
ATLAS structured: https://kepaix.com/api/x402-atlas.php
ATLAS human report: https://kepaix.com/api/x402-atlas-human-report.php
Wallet: Pera Wallet
Network: Algorand Mainnet
Asset: USDC · ASA 31566704
Market Regime price: 0.01 USDC · 10000 atomic units
Main Brain price: 0.01 USDC · 10000 atomic units
ATLAS structured price: 0.02 USDC · 20000 atomic units
ATLAS human report price: 0.10 USDC · 100000 atomic units
Protocol: x402 v2

What The APIs Return

Market ContextResponses may include market regime, market state, asset-level signals, and other educational context appropriate to the endpoint.

ConfidenceConfidence describes the current strength and agreement of available evidence. It is not certainty or a guaranteed future outcome.

Uncertainty & LimitsEndpoints may identify missing, mixed, unavailable, or rapidly changing evidence and provide explicit educational limitations.

Versioned StructureEndpoint identity, response type, versions, timestamps, access type, and structured fields help software interpret resources consistently.

Developer Contract

Understand
The Response

Purpose + Version + Context + Limits

Each KepAIx resource should be interpreted as an educational intelligence response, not a trading instruction. Developers should use the documented endpoint purpose, response version, timestamps, confidence, uncertainty, and limitations together rather than treating any single field as a promise of future behavior.

Integration Principle Readable By Humans. Usable By Software. Stable structures, explicit access behavior, and visible limitations reduce ambiguity for applications and AI agents.

View Endpoints View JSON

Safety & Scope

Educational OnlyKepAIx provides educational market intelligence and does not provide financial, investment, trading, tax, or legal advice.

No Guaranteed OutcomesNo signal, assessment, confidence level, historical result, or paid response guarantees future market behavior.

No Custody Or TradingKepAIx does not manage user funds, access private keys, connect to exchange accounts, or execute trades through these APIs.

Protected MethodsPublic documentation explains outputs and access behavior while proprietary formulas, weights, heuristics, normalization, and internal reasoning remain private.

Public Platform Architecture

Developers, AI Agents, Dashboards, Researchers, And Educational ApplicationsRequest structured educational market intelligence through documented resources

↓

KepAIx Public InterfacesFree discovery APIs, premium x402 APIs, documentation, OpenAPI, and llms.txt

↓

Free DiscoveryEvaluation, testing, educational use, and lightweight integrations

Premium x402Machine-payable access to richer payment-gated intelligence

Educational ExperiencesArena and related learning interfaces that consume platform intelligence

↓

Structured, Versioned JSONContext, confidence, uncertainty, evidence, timestamps, access details, and limitations where available

Verified Product Categories

Main Brain Snapshot APIBroad published KepAIx snapshot with market context, confidence, tracked-asset outputs, timestamps, related resources, and limitations.

KEP-API-001v1 JSON

Market Regime APIFocused market mode, market state, confidence, risk context, summary, update time, and educational limitations.

KEP-API-002v1 JSON

Liquidity Lite APILightweight liquidity-oriented educational context with source-dependent limitations.

KEP-API-003v1 JSON

Derivatives Intelligence APIStructured derivatives-oriented educational intelligence with available context, timestamps, confidence, and limitations.

KEP-API-004v1 JSON

x402 Market Regime IntelligencePremium counterpart to the free Market Regime API, unlocked through HTTP 402 and x402 v2.

KEP-X402-0010.01 USDC

x402 Main Brain IntelligenceBroader protected Main Brain context for direct developer and AI-agent use.

KEP-X402-0030.01 USDC

ATLAS Structured IntelligencePremium machine-readable synthesis of verified KepAIx intelligence with public schema version 0.1.0.

KEP-X402-0020.02 USDCSchema 0.1.0

ATLAS Premium Human ReportSeparate plain-English browser report for people who want readable educational context rather than direct machine JSON.

Human Report0.10 USDC

Verified Product Directory

Main Brain Snapshot API

Broad free public snapshot of published KepAIx intelligence.

KEP-API-001v1 JSON

GET

https://kepaix.com/api/main-brain.php

Market Regime API

Focused free public market-regime intelligence.

KEP-API-002v1 JSON

GET

https://kepaix.com/api/market-regime.php

Liquidity Lite API

Lightweight free public liquidity-oriented educational context.

KEP-API-003v1 JSON

GET

https://kepaix.com/api/liquidity-lite.php

Derivatives Intelligence API

Free public derivatives-oriented educational intelligence.

KEP-API-004v1 JSON

GET

https://kepaix.com/api/derivatives.php

x402 Market Regime Intelligence

Premium market-regime resource using HTTP 402 and x402 v2.

KEP-X402-0010.01 USDC

GET

https://kepaix.com/api/x402-market-regime.php

x402 Main Brain Intelligence

Premium broader structured Main Brain context.

KEP-X402-0030.01 USDC

GET

https://kepaix.com/api/x402-main-brain.php

ATLAS Structured Intelligence

Premium machine-readable synthesis with public schema version 0.1.0.

KEP-X402-0020.02 USDCSchema 0.1.0

GET

https://kepaix.com/api/x402-atlas.php

ATLAS Premium Human Report

Separate human-facing plain-English report purchased through the browser client.

Human Report0.10 USDC

GET

https://kepaix.com/api/x402-atlas-human-report.php

Canonical Product Catalog

Product	Product ID	Access	Version	Canonical Resource
Main Brain Snapshot API	KEP-API-001	Free public	v1 JSON	/api/main-brain.php
Market Regime API	KEP-API-002	Free public	v1 JSON	/api/market-regime.php
Liquidity Lite API	KEP-API-003	Free public	v1 JSON	/api/liquidity-lite.php
Derivatives Intelligence API	KEP-API-004	Free public	v1 JSON	/api/derivatives.php
x402 Market Regime Intelligence	KEP-X402-001	Paid x402 · 0.01 USDC	x402 v2	/api/x402-market-regime.php
x402 Main Brain Intelligence	KEP-X402-003	Paid x402 · 0.01 USDC	x402 v2	/api/x402-main-brain.php
ATLAS Structured Intelligence	KEP-X402-002	Paid x402 · 0.02 USDC	Schema 0.1.0	/api/x402-atlas.php
ATLAS Premium Human Report	Human Report	Paid x402 · 0.10 USDC	Human-facing	/api/x402-atlas-human-report.php

Free Discovery APIs

PurposePublic endpoints support discovery, evaluation, testing, educational use, lightweight integrations, and developer onboarding.

AccessVerified public endpoints return machine-readable JSON without a traditional account or subscription flow.

Expected UseDevelopers can inspect response structures, prototype dashboards, build educational tools, and evaluate whether premium intelligence fits a later workflow.

LimitFree access should not be interpreted as unlimited capacity, guaranteed uptime, a guaranteed future contract, or permission to abuse shared infrastructure.

Premium Intelligence

PurposePremium endpoints provide richer payment-gated educational intelligence through machine-payable access.

SustainabilityPaid access helps support the infrastructure and continued development required to maintain and improve the platform.

No Outcome GuaranteePayment unlocks a digital resource. It does not guarantee accuracy, profit, market direction, or any future outcome.

Review x402 Access Open Browser Reference

OpenAPI Discovery

Machine-Readable API Map The OpenAPI file helps developer tools, integrations, AI agents, and reviewers discover documented KepAIx paths and response shapes.

OpenAPI Resources

JSON: https://kepaix.com/openapi.json
YAML: https://kepaix.com/openapi.yaml

LLM Discovery

AI-Agent Resource Map The llms.txt file gives AI systems a concise map of KepAIx, verified public resources, premium access, canonical documentation, and educational boundaries.

Discovery Resources

LLM map: https://kepaix.com/llms.txt
Robots: https://kepaix.com/robots.txt
Sitemap: https://kepaix.com/sitemap.xml
Browser reference: https://kepaix.com/x402-buyer/

Recommended AI Integration Order

1. Market RegimeRead focused market context.

2. Main BrainRead the broader public snapshot.

3. LiquidityAdd liquidity and structure context.

4. DerivativesAdd derivatives pressure context.

5. ReasoningRequest supported-asset reasoning.

6. StatisticsInspect public network statistics.

7. x402Upgrade to paid intelligence when supported.

Agent And Tool Compatibility

Standards-Based Compatibility KepAIx uses normal HTTPS, machine-readable JSON, OpenAPI 3.1, and x402 payment behavior. Compatibility below describes intended integration patterns and does not imply a partnership, endorsement, or native product integration.

AI AssistantsTools that can retrieve HTTPS resources and interpret JSON.

Autonomous AgentsAgents capable of API discovery, structured calls, and safe error handling.

MCP And Tool ServersCustom connectors that map OpenAPI operations into callable tools.

DashboardsBrowser or server applications that consume and display JSON.

Research WorkflowsEducational analysis pipelines that preserve timestamps and limitations.

x402 ClientsClients that support HTTP 402 discovery, payment signing, verification, and settlement.

OpenAPI ToolsGenerators and explorers that support OpenAPI 3.1 documents.

Educational AppsLearning applications that present intelligence without financial-advice claims.

Browser ApplicationsProduction browser clients using Pera Wallet, HTTP 402, Algorand MainNet, and x402 v2.

Premium x402 Resources

x402 Market Regime IntelligenceGET https://kepaix.com/api/x402-market-regime.php

x402 Main Brain IntelligenceGET https://kepaix.com/api/x402-main-brain.php

ATLAS Structured IntelligenceGET https://kepaix.com/api/x402-atlas.php

ATLAS Premium Human ReportGET https://kepaix.com/api/x402-atlas-human-report.php

Unpaid BehaviorWithout valid payment, each premium resource returns HTTP 402 Payment Required with machine-readable payment requirements.

Payment Requirements

Current Verified Terms All current premium endpoints use x402 v2 on Algorand Mainnet, with the exact payment amount determined by the selected product.

Payment Details

Network: Algorand Mainnet
Asset: USDC
ASA: 31566704
Market Regime: 0.01 USDC
Market Regime atomic units: 10000
Main Brain: 0.01 USDC
Main Brain atomic units: 10000
ATLAS structured: 0.02 USDC
ATLAS structured atomic units: 20000
ATLAS human report: 0.10 USDC
ATLAS human report atomic units: 100000
Protocol: x402 v2
Response: application/json

x402 Access Flow

RequestThe client requests the premium KepAIx resource without payment attached.

402 RequiredThe endpoint returns HTTP 402 and machine-readable payment requirements.

Client SignsThe client prepares and signs the selected product's exact Algorand USDC payment.

Verify & SettleThe facilitator verifies and settles the payment on Algorand Mainnet.

ResourceThe endpoint returns HTTP 200 with the paid educational intelligence resource.

Example Main Brain Snapshot

/api/main-brain.php

{
  "success": true,
  "endpoint": "main-brain",
  "version": "v1",
  "access": "free_public",
  "market_state": {},
  "coins": {},
  "updated": "ISO-8601 timestamp",
  "educational_only": true
}

Example Market Regime

/api/market-regime.php

{
  "success": true,
  "endpoint": "market-regime",
  "version": "v1",
  "access": "free_public",
  "market_mode": "RISK_OFF",
  "market_state": "CAUTION",
  "confidence": 46.1,
  "updated": "ISO-8601 timestamp",
  "disclaimer": "Educational information only."
}

Example Liquidity Lite

/api/liquidity-lite.php

{
  "success": true,
  "endpoint": "liquidity-lite",
  "version": "v1",
  "access": "free_public",
  "asset_count": 7,
  "assets_verified": 7,
  "limitations": [],
  "educational_only": true
}

Example Derivatives Intelligence

/api/derivatives.php

{
  "success": true,
  "endpoint": "derivatives",
  "version": "v1",
  "access": "free_public",
  "overall_state": "crowded_long_pressure",
  "overall_vote": "caution",
  "confidence": 62,
  "limitations": []
}

Example 402 Response

No Valid Payment Without valid payment, a premium endpoint returns HTTP 402 with machine-readable payment requirements.

HTTP 402

{
  "error": "Payment required",
  "project": "KepAIx",
  "endpoint": "x402-market-regime",
  "x402Version": 2,
  "message": "Payment is required before this educational intelligence resource is returned."
}

Example Atlas Response Shape

Schema-Level Illustration This example describes the public response shape without exposing protected scoring, weighting, thresholds, heuristics, prompts, or reasoning assembly.

/api/x402-atlas.php · schema 0.1.0

{
  "success": true,
  "product_id": "KEP-X402-002",
  "endpoint": "x402-atlas",
  "schema_version": "0.1.0",
  "payment_status": "settled",
  "summary": {},
  "confidence": {},
  "evidence": {},
  "limitations": [],
  "updated": "ISO-8601 timestamp",
  "educational_only": true
}

Verified Behaviors

Four Free Public APIsMain Brain Snapshot, Market Regime, Liquidity Lite, and Derivatives Intelligence return machine-readable educational JSON without x402 payment.

OpenAPI DiscoveryThe live OpenAPI resource documents the public API ecosystem and supported paths.

llms.txt DiscoveryThe live LLM resource provides AI systems with a concise map of canonical educational API resources.

HTTP 402All verified premium x402 endpoints return HTTP 402 when valid payment is absent or invalid.

HTTP 200 After SettlementA verified premium endpoint returns its documented resource after successful payment verification and settlement.

Production Browser ClientThe live browser client supports the separate 0.10 USDC human ATLAS report and 0.02 USDC structured ATLAS agent flow using Pera Wallet, Algorand MainNet USDC, facilitator verification, settlement, and protected responses.

Settlement Proof

Successful Mainnet Tests These transaction references document successful live testing of the paid x402 endpoint, including the production browser reference implementation.

Algorand Mainnet Transactions

AURN3O6SR2ZPNUZET3MHQO5DJZBCW2H33HUWC3YZ5XCCIYNT5PBA
KHJO5UPAUBB4A2Y6RWVDONPFXAA2RW7TUQLSAFX6NWH5FI5ZIJOQ
MMHISMDJIWKIGUNNBODNBHEUQLF35BTITXPCTM7WPWKNBLF6MWKA

No-Payment Test

Expected Behavior A direct request to the premium endpoint without payment should return HTTP 402 Payment Required.

PowerShell

try {
  Invoke-WebRequest `
    -Uri "https://kepaix.com/api/x402-market-regime.php" `
    -Method GET
}
catch {
  $_.Exception.Response.StatusCode.value__
  $_.ErrorDetails.Message
}

Integration Guidance

Check The Endpoint PurposeUse each resource only for the purpose described in its documentation and visible response fields.

Read Versions And TimestampsDo not assume fields, freshness, or response contracts without checking the returned version and update information.

Handle UncertaintyApplications should preserve confidence, uncertainty, limitations, and educational disclaimers rather than discarding them.

Fail SafelyHandle non-200 responses, missing fields, unavailable data, timeouts, and schema changes without converting incomplete information into certainty.

KepAIx API Trust Contract

Educational OnlyKepAIx explains market context for learning and software integration, not financial advice.

Confidence Is Not CertaintyConfidence reports evidence strength and agreement, not a guaranteed future result.

Uncertainty Is PreservedMixed, incomplete, unavailable, or changing evidence should remain visible to downstream users.

Methods Stay ProtectedPublic APIs expose useful outputs while proprietary formulas, weights, heuristics, and reasoning implementation remain private.

Crypto Market Intelligence APIFree JSON Data For Developers And AI Agents