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 14 APIs on the APIs.io network, including Solana RPC, Addresses API, Admin API, and 11 more. 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

32.2/100 thin ▬ flat Agent 33/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Web3 Blockchain Solana RPC DAS Streams

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 32.2/100 · thin

Contract Quality 14.0 / 23

Developer Ergonomics 3.9 / 18

Access Clarity 2.8 / 18

Operational Transparency 1.2 / 12

Contract Governance 1.5 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 20

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).

Helius Addresses API

Enhanced on-chain identity data with complete wallet activity and ownership information.

Helius Admin API

The Admin API from Helius — 1 operation(s) for admin.

Helius Balances API

Query token and NFT balances

Helius Funding API

Wallet funding information

Helius Helius API Catalog API

The Helius API Catalog API from Helius — 1 operation(s) for helius api catalog.

Helius History API

Transaction history and balance changes

Helius Identity API

Lookup wallet identities and known addresses

Helius NFTs API

Access comprehensive NFT data including events, collection aggregations, real-time stats, and complete historical activity on Solana.

Helius Sender API

The Sender API from Helius — 2 operation(s) for sender.

Helius Tokens API

Complete token account data, on-chain and off-chain metadata, and detailed information for both fungible and non-fungible Solana tokens.

Helius Transactions API

Enhanced and human-readable transaction histories with decoded instruction data and detailed context.

Helius Transfers API

Token transfer activity

Helius Webhooks API

Configure real-time blockchain notifications for any Solana address, transaction type, or on-chain event with customizable delivery options.

Scroll for all 20

Open Collections 15

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

API Collection

OPEN COLLECTION

Helius API Catalog Addresses API

OPEN COLLECTION

Helius API Catalog Addresses Admin API

OPEN COLLECTION

Helius API Catalog Addresses Balances API

OPEN COLLECTION

Helius API Catalog Addresses Funding API

OPEN COLLECTION

Addresses Helius API Catalog API

OPEN COLLECTION

Helius API Catalog Addresses History API

OPEN COLLECTION

Helius API Catalog Addresses Identity API

OPEN COLLECTION

Helius API Catalog Addresses NFTs API

OPEN COLLECTION

Helius API Catalog Addresses Sender API

OPEN COLLECTION

Helius API Catalog Addresses Tokens API

OPEN COLLECTION

Helius API Catalog Addresses Transactions API

OPEN COLLECTION

Helius API Catalog Addresses Transfers API

OPEN COLLECTION

Helius API Catalog Addresses Webhooks API

OPEN COLLECTION

Helius API Catalog

OPEN COLLECTION

Scroll for all 15

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

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

Website

Website

Other 1

Properties that don't map to a standard resource type

AgentCard

AgentCard

Source (apis.yml)

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
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: '0.23'
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
  - Transaction
  tags_raw:
  - 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
  - Webhook
  tags_raw:
  - 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
  - Transaction
  - Jito
  tags_raw:
  - 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
- aid: helius:helius-addresses-api
  name: Helius Addresses API
  description: Enhanced on-chain identity data with complete wallet activity and ownership information.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Addresses
  properties:
  - type: OpenAPI
    url: openapi/helius-addresses-api-openapi.yml
- aid: helius:helius-admin-api
  name: Helius Admin API
  description: The Admin API from Helius — 1 operation(s) for admin.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Admin
  properties:
  - type: OpenAPI
    url: openapi/helius-admin-api-openapi.yml
- aid: helius:helius-balances-api
  name: Helius Balances API
  description: Query token and NFT balances
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Balances
  properties:
  - type: OpenAPI
    url: openapi/helius-balances-api-openapi.yml
- aid: helius:helius-funding-api
  name: Helius Funding API
  description: Wallet funding information
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Funding
  properties:
  - type: OpenAPI
    url: openapi/helius-funding-api-openapi.yml
- aid: helius:helius-helius-api-catalog-api
  name: Helius Helius API Catalog API
  description: The Helius API Catalog API from Helius — 1 operation(s) for helius api catalog.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Helius API Catalog
  properties:
  - type: OpenAPI
    url: openapi/helius-helius-api-catalog-api-openapi.yml
- aid: helius:helius-history-api
  name: Helius History API
  description: Transaction history and balance changes
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - History
  properties:
  - type: OpenAPI
    url: openapi/helius-history-api-openapi.yml
- aid: helius:helius-identity-api
  name: Helius Identity API
  description: Lookup wallet identities and known addresses
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Identity
  properties:
  - type: OpenAPI
    url: openapi/helius-identity-api-openapi.yml
- aid: helius:helius-nfts-api
  name: Helius NFTs API
  description: Access comprehensive NFT data including events, collection aggregations, real-time stats, and complete historical
    activity on Solana.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - NFT
  tags_raw:
  - NFTs
  properties:
  - type: OpenAPI
    url: openapi/helius-nfts-api-openapi.yml
- aid: helius:helius-sender-api
  name: Helius Sender API
  description: The Sender API from Helius — 2 operation(s) for sender.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Sender
  properties:
  - type: OpenAPI
    url: openapi/helius-sender-api-openapi.yml
- aid: helius:helius-tokens-api
  name: Helius Tokens API
  description: Complete token account data, on-chain and off-chain metadata, and detailed information for both fungible and
    non-fungible Solana tokens.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Tokens
  properties:
  - type: OpenAPI
    url: openapi/helius-tokens-api-openapi.yml
- aid: helius:helius-transactions-api
  name: Helius Transactions API
  description: Enhanced and human-readable transaction histories with decoded instruction data and detailed context.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/helius-transactions-api-openapi.yml
- aid: helius:helius-transfers-api
  name: Helius Transfers API
  description: Token transfer activity
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Transfers
  properties:
  - type: OpenAPI
    url: openapi/helius-transfers-api-openapi.yml
- aid: helius:helius-webhooks-api
  name: Helius Webhooks API
  description: Configure real-time blockchain notifications for any Solana address, transaction type, or on-chain event with
    customizable delivery options.
  humanURL: https://www.helius.dev/docs/rpc
  baseURL: https://mainnet.helius-rpc.com/?api-key={apiKey}
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/helius-webhooks-api-openapi.yml
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

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