Helius website screenshot

Helius

Helius is a Solana developer platform offering Solana JSON-RPC, the Digital Asset Standard (DAS) API for NFTs/tokens, Enhanced Transactions, Webhooks, LaserStream gRPC streaming, Sender (transaction routing), Photon RPC, and Dedicated Nodes.

Helius publishes 1 API on the APIs.io network: Solana RPC. Tagged areas include Web3, Blockchain, Solana, RPC, and DAS.

The Helius catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Helius’ developer surface includes authentication and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
43.1/100 developing ▼ -6.2 Agent 40/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
7 APIs
Web3BlockchainSolanaRPCDASStreams

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 43.1/100 · developing
Contract Quality 15.1 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 5.7 / 12
Discoverability 7.4 / 10
Agent readiness — 40/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 8 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/helius: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Helius Solana RPC

Solana JSON-RPC and WebSocket endpoints with enhanced WebSockets, archival data, and staked connections.

Helius Digital Asset Standard (DAS) API

Solana JSON-RPC API for unified asset queries (compressed NFTs, regular NFTs, tokens) including getAsset, getAssetsByOwner, searchAssets.

Helius Enhanced Transactions API

REST API for parsed and human-readable Solana transaction history with token metadata.

Helius Webhooks

REST API for managing webhook subscriptions for Solana on-chain events with parsed transaction payloads.

Helius LaserStream

Low-latency gRPC streaming of Solana account, slot, transaction, and block updates (Geyser-compatible).

Helius Sender

Parallel transaction routing through Helius and Jito for inclusion latency optimization.

Helius Photon RPC (ZK Compression)

Indexed RPC for Solana ZK compression (compressed accounts).

Scroll for all 7

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Helius API Catalog

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Helius Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Helius Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Helius Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Helius WebSocket APIs

AsyncAPI 2.6 description of Helius's real-time WebSocket interfaces for Solana. Coverage: * Standard Solana JSON-RPC PubSub subscriptions exposed by Helius RPC. * Helius enhance...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Helius API Rules

8 rules · 1 errors 6 warnings 1 info

SPECTRAL

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Helius Authentication

apiKey · 2 schemes

SECURITY

Helius Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Helius Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Helius Agentic Access

31 operations · 16 acting

31 operations · 16 acting

AGENTIC

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Other 1

Properties that don't map to a standard resource type

AgentCard
AgentCard

Source (apis.yml)

apis.yml Raw ↑ 
aid: helius
url: https://raw.githubusercontent.com/api-evangelist/helius/refs/heads/main/apis.yml
name: Helius
kind: company
description: Helius is a Solana developer platform offering Solana JSON-RPC, the Digital Asset Standard (DAS) API for NFTs/tokens,
  Enhanced Transactions, Webhooks, LaserStream gRPC streaming, Sender (transaction routing), Photon RPC, and Dedicated Nodes.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Web3
- Blockchain
- Solana
- RPC
- DAS
- Streams
created: '2026-05-08'
modified: '2026-05-29'
specificationVersion: '0.19'
apis:
- aid: helius:rpc
  name: Helius Solana RPC
  description: Solana JSON-RPC and WebSocket endpoints with enhanced WebSockets, archival data, and staked connections.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - JSON-RPC
  - Solana
  - WebSocket
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/rpc
  - type: AsyncAPI
    url: asyncapi/helius-asyncapi.yml
- aid: helius:das
  name: Helius Digital Asset Standard (DAS) API
  description: Solana JSON-RPC API for unified asset queries (compressed NFTs, regular NFTs, tokens) including getAsset, getAssetsByOwner,
    searchAssets.
  humanURL: https://www.helius.dev/docs/das-api
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - JSON-RPC
  - DAS
  - NFT
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/das-api
- aid: helius:enhanced-tx
  name: Helius Enhanced Transactions API
  description: REST API for parsed and human-readable Solana transaction history with token metadata.
  humanURL: https://www.helius.dev/docs/api-reference/enhanced-transactions-api
  baseURL: https://api.helius.xyz/v0
  tags:
  - REST
  - Transactions
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/api-reference/enhanced-transactions-api
- aid: helius:webhooks
  name: Helius Webhooks
  description: REST API for managing webhook subscriptions for Solana on-chain events with parsed transaction payloads.
  humanURL: https://www.helius.dev/docs/webhooks
  baseURL: https://api.helius.xyz/v0/webhooks
  tags:
  - REST
  - Webhooks
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/webhooks
- aid: helius:laserstream
  name: Helius LaserStream
  description: Low-latency gRPC streaming of Solana account, slot, transaction, and block updates (Geyser-compatible).
  humanURL: https://www.helius.dev/docs/laserstream
  baseURL: grpc://laserstream-mainnet.helius-rpc.com
  tags:
  - gRPC
  - Streaming
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/laserstream
- aid: helius:sender
  name: Helius Sender
  description: Parallel transaction routing through Helius and Jito for inclusion latency optimization.
  humanURL: https://www.helius.dev/docs/sender
  baseURL: https://sender.helius-rpc.com
  tags:
  - JSON-RPC
  - Transactions
  - Jito
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/sender
- aid: helius:photon
  name: Helius Photon RPC (ZK Compression)
  description: Indexed RPC for Solana ZK compression (compressed accounts).
  humanURL: https://www.helius.dev/docs/photon
  baseURL: https://mainnet.helius-rpc.com
  tags:
  - JSON-RPC
  - ZK Compression
  properties:
  - type: Documentation
    url: https://www.helius.dev/docs/photon
common:
- type: AgentCard
  url: a2a/helius-a2a.yml
  name: A2A Agent Card
  description: Agent Card served at /.well-known/agent-card.json (near-conformant against A2A 1.0.0).
- type: AgenticAccess
  url: agentic-access/helius-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/helius-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/helius-domain-security.yml
- type: Authentication
  url: authentication/helius-authentication.yml
- type: GitHubOrganization
  url: https://github.com/helius-labs
- type: LinkedIn
  url: https://www.linkedin.com/company/heliusapi
- type: Website
  url: https://www.helius.dev/
- type: Plans
  url: plans/helius-plans-pricing.yml
- type: RateLimits
  url: rate-limits/helius-rate-limits.yml
- type: FinOps
  url: finops/helius-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com