Syndica is a Solana-only infrastructure company building developer infrastructure for Web3. Its production platform provides fault-tolerant, load-balanced Solana JSON-RPC over HTTP and WebSocket from four global regions, plus ChainStream — a real-time JSON-RPC streaming API that consolidates transaction, slot, and block updates from multiple validators using a "fastest wins" strategy with optional cross-validator verification. Syndica also operates a 0%-commission Solana staking validator running Jito-Solana for MEV optimization, publishes Solana protocol research, and develops Sig — an open-source Solana validator client written in Zig — together with companion libraries (rocksdb-zig, lsquic, boringssl-zig, zstd.zig, base58-zig) under the Apache-2.0 license.
Syndica is listed with 4 APIs on the APIs.io network, including Solana RPC (WebSocket) API, ChainStream API, and 2 more. Tagged areas include Solana, Blockchain, Web3, RPC, and Streaming.
The Syndica catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.
Syndica’s developer surface includes developer portal, documentation, FAQ, support, engineering blog, signup flow, pricing, and 19 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Horizontal (data, software, accessibility, platform) regime, so
Regulatory Posture carries 15 points of the composite.
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applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
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Agent readiness — checks not met, largest first (exact, from this profile):
MCP Server+12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics+8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card+8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples+7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
9 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Access Clarityscores 23.7 — up to +15.3 composite points
The Kin Score Market layer reads a provider inside its market:
its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted:
not part of the Kin Score or agent readiness.
Registered MCP server and declares compatibility are report only — not weighted.
Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
High-performance Solana JSON-RPC HTTP endpoints served from a fault-tolerant elastic-node architecture across four global regions (Northern Virginia, Oregon, London, Singapore)....
ChainStream is Syndica's real-time Solana data streaming API. It consolidates updates from multiple validators using a "fastest wins" strategy so the subscriber benefits from th...
Sig is Syndica's open-source Solana validator client implemented in Zig, built for performance, modular RPC, and read-optimized operation. The project exposes a Solana-compatibl...
ChainStream real-time streaming API — transactionsSubscribe, slotsSubscribe, blocksSubscribe over WebSocket JSON-RPC 2.0 at wss://chainstream.api.syndica.io
ChainStream "fastest wins" multi-validator consolidation for lower latency and no-miss delivery
ChainStream `verified` parameter for cross-validator confirmation at `processed` commitment
Edge gateway routing across four global regions — Northern Virginia, Oregon, London, Singapore
Power on-chain trading bots, market makers, and liquidation engines with low-latency ChainStream notifications — production users have cut limit-order time-to-fill from 10s to 3...
DEX and DeFi backends
Stream account, program, and signature updates for AMMs, perps, and lending protocols without running self-hosted validator infrastructure.
Wallet and explorer infrastructure
Serve high-volume getAccountInfo, getTransaction, and getSignaturesForAddress traffic from Syndica's load-balanced HTTP RPC fleet.
Indexers and data warehouses
Continuously ingest Solana transactions, slots, and blocks via ChainStream into ClickHouse, BigQuery, or self-hosted Postgres for analytics.
NFT mint and marketplace tooling
Subscribe to program-derived account changes for real-time mint, list, sale, and bid detection.
Solana staking
Delegate SOL to the Syndica validator (0% commission, Jito-Solana client, MEV optimization) for self-custody staking rewards.
Solana protocol R&D
Build on top of, or contribute to, Sig — Syndica's open-source Zig validator client — and consume its companion libraries (rocksdb-zig, lsquic, boringssl-zig).
Multi-tenant Solana JSON-RPC HTTP and WebSocket endpoints with 10M free monthly requests, credential-level rate limits, and global edge routing.
ChainStream
Premium real-time Solana data streaming API consolidating updates from multiple validators with "fastest wins" routing and optional cross-validator verification.
Enterprise / Dedicated
Custom RPC capacity, dedicated nodes, ChainStream throughput, and SLA — priced via the Cost Estimator and direct sales.
Staking
Delegate SOL to the Syndica validator (0% commission, Jito-Solana, MEV optimization) with full self-custody.
Sig (Open Source)
Syndica's open-source Zig Solana validator client, plus companion libraries — free to use and contribute to.
Research
Syndica Research Library — public protocol and consensus research alongside the Research Blog tag.
aid: syndica-io
url: https://raw.githubusercontent.com/api-evangelist/syndica-io/refs/heads/main/apis.yml
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
apis:
- aid: syndica:syndica-solana-rpc-http-api
name: Syndica Solana RPC (HTTP) API
tags:
- Solana
- RPC
- Blockchain
- JSON-RPC
- HTTP
humanURL: https://docs.syndica.io/platform/solana-rpc/overview
baseURL: https://solana-mainnet.api.syndica.io
properties:
- url: https://docs.syndica.io/platform/solana-rpc/overview
type: Documentation
- url: https://docs.syndica.io/platform/getting-started/make-your-first-rpc-call
type: GettingStarted
- url: https://docs.syndica.io/platform/concepts/api-keys
type: Authentication
- url: https://blog.syndica.io/credential-rate-limits-manage-and-secure-your-solana-rpc-endpoints-using-custom-rules/
type: RateLimits
- url: https://github.com/Syndica/solana-rpc-demo
type: SampleCode
description: High-performance Solana JSON-RPC HTTP endpoints served from a fault-tolerant elastic-node architecture across
four global regions (Northern Virginia, Oregon, London, Singapore). Supports the full standard Solana RPC method surface
(getAccountInfo, getBalance, getTransaction, sendTransaction, getProgramAccounts, getSignaturesForAddress, etc.) with
credential-level rate limits, per-method routing rules, and observability (detailed logging, performance metrics, usage
insights).
- aid: syndica:syndica-solana-rpc-websocket-api
name: Syndica Solana RPC (WebSocket) API
tags:
- Solana
- RPC
- Blockchain
- WebSocket
- Pub/Sub
- Streaming
tags_raw:
- Solana
- RPC
- Blockchain
- WebSocket
- PubSub
- Streaming
humanURL: https://docs.syndica.io/platform/getting-started/subscribe-to-websocket-events
baseURL: wss://solana-mainnet.api.syndica.io
properties:
- url: https://docs.syndica.io/platform/getting-started/subscribe-to-websocket-events
type: Documentation
- url: https://docs.syndica.io/platform/solana-rpc/websocket/blockSubscribe
type: APIReference
- url: https://docs.syndica.io/platform/concepts/api-keys
type: Authentication
- url: https://raw.githubusercontent.com/api-evangelist/syndica-io/refs/heads/main/asyncapi/syndica-io-asyncapi.yml
type: AsyncAPI
description: Standard Solana RPC PubSub WebSocket service supporting accountSubscribe, programSubscribe, signatureSubscribe,
slotSubscribe, blockSubscribe, logsSubscribe, and rootSubscribe. Provides a drop-in replacement for `wss://api.mainnet-beta.solana.com`
with Syndica's edge routing, validator consolidation, and per-credential rate limits.
- aid: syndica:syndica-chainstream-api
name: Syndica ChainStream API
tags:
- Solana
- ChainStream
- Streaming
- WebSocket
- JSON-RPC
- Real-Time
- Blockchain
tags_raw:
- Solana
- ChainStream
- Streaming
- WebSocket
- JSON-RPC
- Real Time
- Blockchain
humanURL: https://docs.syndica.io/platform/chainstream-api/
baseURL: wss://chainstream.api.syndica.io
properties:
- url: https://docs.syndica.io/platform/chainstream-api/
type: Documentation
- url: https://docs.syndica.io/platform/chainstream-api/slot-subscriptions
type: APIReference
- url: https://docs.syndica.io/platform/concepts/api-keys
type: Authentication
- url: https://syndica.io/infrastructure/chainstream
type: ProductPage
- url: https://blog.syndica.io/solana-data-streaming-how-to-power-your-dapp-with-real-time-data/
type: Blog
- url: https://raw.githubusercontent.com/api-evangelist/syndica-io/refs/heads/main/asyncapi/syndica-io-asyncapi.yml
type: AsyncAPI
description: ChainStream is Syndica's real-time Solana data streaming API. It consolidates updates from multiple validators
using a "fastest wins" strategy so the subscriber benefits from the lowest-latency notification across the validator set,
and offers an optional `verified` parameter that delivers only transactions confirmed by multiple validators at `processed`
commitment. ChainStream uses JSON-RPC 2.0 over WebSocket (`wss://chainstream.api.syndica.io/api-key/<API_KEY>`) and supports
`transactionsSubscribe`, `slotsSubscribe`, and encoded `blocksSubscribe` against `solana-mainnet` (devnet coming). Production
users have cut limit-order time-to-fill from 10s to 300ms with it.
- aid: syndica:syndica-sig-validator-rpc-api
name: Syndica Sig Validator RPC API
tags:
- Solana
- Validator
- Sig
- Zig
- Open Source
- RPC
tags_raw:
- Solana
- Validator
- Sig
- Zig
- Open Source
- RPC
- Open-Source
humanURL: https://github.com/Syndica/sig
properties:
- url: https://github.com/Syndica/sig
type: GitHubRepository
- url: https://sig.fun/
type: Documentation
- url: https://syndica.io/open-source/sig
type: ProductPage
- url: https://blog.syndica.io/tag/sig/
type: Blog
- url: https://blog.syndica.io/a-solana-validator-client-explained-everything-you-need-to-know/
type: Blog
description: Sig is Syndica's open-source Solana validator client implemented in Zig, built for performance, modular RPC,
and read-optimized operation. The project exposes a Solana-compatible RPC surface and is being developed in the open under
the Apache-2.0 license, with companion libraries rocksdb-zig, lsquic, boringssl-zig, zstd.zig, and base58-zig in the same
GitHub organization.
name: Syndica
tags:
- Solana
- Blockchain
- Web3
- RPC
- Streaming
- Infrastructure
- Validator
- Staking
- Real-Time
kind: contract
deliveryModel:
model: saas
license_evidence:
not_product:
- syndica/rocksdb-zig
- syndica/sig
- syndica/solana-rpc-demo
open_source: unknown
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: low
source:
- pricing
- repository-not-product
generated: '2026-09-25'
method: derived
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source:
- security
generated: '2026-11-06'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/syndica-io.png
access: 3rd-Party
common:
- type: Website
url: https://www.syndica.io/
- type: DomainSecurity
url: security/syndica-io-domain-security.yml
- url: https://syndica.io
type: Portal
- url: https://syndica.io/enterprise
name: Enterprise Portal
type: Portal
- url: https://docs.syndica.io
type: Documentation
- url: https://docs.syndica.io/platform/staking/overview
name: Stake Docs
type: Documentation
- url: https://docs.syndica.io/platform/faq
type: FAQ
- url: https://docs.syndica.io/platform/support
type: Support
- url: https://status.syndica.io
type: StatusPage
- url: https://blog.syndica.io/
type: Blog
- url: https://syndica.io/research?n=library
name: Research Library
type: Research
- url: https://syndica.io/company/about-us
type: AboutUs
- url: https://syndica.io/company/contact-us
type: ContactUs
- url: https://syndica.io/company/careers
type: Careers
- url: https://syndica.io/enterprise
name: Contact Sales
type: Signup
- url: https://syndica.io/enterprise/calculator
name: Cost Estimator
type: Pricing
- url: https://syndica.io/stake
name: Stake With Syndica
type: ProductPage
- url: https://syndica.io/open-source/sig
name: Sig Validator
type: OpenSource
- url: https://sig.fun/
name: Sig Docs
type: Documentation
- url: https://github.com/Syndica
type: GitHubOrganization
- url: https://github.com/Syndica/sig
name: Sig Validator (Zig)
type: GitHubRepository
- url: https://github.com/Syndica/solana-rpc-demo
name: Solana RPC Demo (Rust)
type: GitHubRepository
- url: https://github.com/Syndica/rocksdb-zig
name: rocksdb-zig
type: GitHubRepository
- url: https://www.linkedin.com/company/syndica-io
type: LinkedIn
- url: https://twitter.com/Syndica_io
type: X-Twitter
- url: mailto:support@syndica.io
name: support@syndica.io
type: Support
- type: Features
data:
- Solana JSON-RPC over HTTP — fault-tolerant, load-balanced elastic-node architecture
- Solana JSON-RPC PubSub over WebSocket — accountSubscribe, programSubscribe, signatureSubscribe, slotSubscribe, blockSubscribe,
logsSubscribe, rootSubscribe
- ChainStream real-time streaming API — transactionsSubscribe, slotsSubscribe, blocksSubscribe over WebSocket JSON-RPC 2.0
at wss://chainstream.api.syndica.io
- ChainStream "fastest wins" multi-validator consolidation for lower latency and no-miss delivery
- ChainStream `verified` parameter for cross-validator confirmation at `processed` commitment
- Edge gateway routing across four global regions — Northern Virginia, Oregon, London, Singapore
- Per-credential (API key) custom rate-limit rules — per-method, per-IP, per-credential
- Detailed observability — RPC call logging, performance metrics, usage insights, analytics dashboard
- 99.99% uptime SLA on production endpoints; billions of RPC requests served monthly
- 10M free RPC requests per month entry tier; enterprise pricing via Cost Estimator
- Open-source Sig validator client written in Zig (Apache-2.0) for read-optimized validator operation
- Solana staking validator with 0% commission, MEV optimization via Jito-Solana client
- Research arm publishing Solana protocol and consensus research
sources:
- https://syndica.io
- https://syndica.io/enterprise
- https://docs.syndica.io/platform/chainstream-api/
- https://docs.syndica.io/platform/solana-rpc/overview
- https://blog.syndica.io/credential-rate-limits-manage-and-secure-your-solana-rpc-endpoints-using-custom-rules/
- https://github.com/Syndica/sig
updated: '2026-05-25'
- type: UseCases
data:
- name: High-frequency Solana trading
description: Power on-chain trading bots, market makers, and liquidation engines with low-latency ChainStream notifications
— production users have cut limit-order time-to-fill from 10s to 300ms.
- name: DEX and DeFi backends
description: Stream account, program, and signature updates for AMMs, perps, and lending protocols without running self-hosted
validator infrastructure.
- name: Wallet and explorer infrastructure
description: Serve high-volume getAccountInfo, getTransaction, and getSignaturesForAddress traffic from Syndica's load-balanced
HTTP RPC fleet.
- name: Indexers and data warehouses
description: Continuously ingest Solana transactions, slots, and blocks via ChainStream into ClickHouse, BigQuery, or
self-hosted Postgres for analytics.
- name: NFT mint and marketplace tooling
description: Subscribe to program-derived account changes for real-time mint, list, sale, and bid detection.
- name: Solana staking
description: Delegate SOL to the Syndica validator (0% commission, Jito-Solana client, MEV optimization) for self-custody
staking rewards.
- name: Solana protocol R&D
description: Build on top of, or contribute to, Sig — Syndica's open-source Zig validator client — and consume its companion
libraries (rocksdb-zig, lsquic, boringssl-zig).
sources:
- https://syndica.io
- https://syndica.io/enterprise
- https://docs.syndica.io/platform/chainstream-api/
- https://syndica.io/stake
updated: '2026-05-25'
- type: Integrations
data:
- name: Solana mainnet-beta
description: Drop-in replacement for `api.mainnet-beta.solana.com` HTTP and WebSocket endpoints.
- name: Solana web3.js
description: Use Syndica's RPC URL directly with `@solana/web3.js` `Connection` and `PublicKey` flows.
- name: solana-cli
description: Configure `solana config set --url https://solana-mainnet.api.syndica.io/api-key/<KEY>` for CLI access.
- name: Anchor framework
description: Point Anchor's provider at a Syndica RPC URL for Solana program development.
- name: Helius / Triton / QuickNode workflows
description: Mix-and-match providers — Syndica positions itself as the Solana-only specialist alongside multi-chain RPC
vendors.
- name: Jito-Solana
description: Syndica's validator runs the Jito-Solana client for MEV-aware block production.
- name: GitHub
description: Open-source Sig validator and companion Zig libraries are developed publicly under the Syndica GitHub organization.
sources:
- https://syndica.io
- https://github.com/Syndica
- https://syndica.io/stake
updated: '2026-05-25'
- type: Solutions
data:
- name: Solana RPC (Shared)
description: Multi-tenant Solana JSON-RPC HTTP and WebSocket endpoints with 10M free monthly requests, credential-level
rate limits, and global edge routing.
- name: ChainStream
description: Premium real-time Solana data streaming API consolidating updates from multiple validators with "fastest
wins" routing and optional cross-validator verification.
- name: Enterprise / Dedicated
description: Custom RPC capacity, dedicated nodes, ChainStream throughput, and SLA — priced via the Cost Estimator and
direct sales.
- name: Staking
description: Delegate SOL to the Syndica validator (0% commission, Jito-Solana, MEV optimization) with full self-custody.
- name: Sig (Open Source)
description: Syndica's open-source Zig Solana validator client, plus companion libraries — free to use and contribute
to.
- name: Research
description: Syndica Research Library — public protocol and consensus research alongside the Research Blog tag.
sources:
- https://syndica.io
- https://syndica.io/enterprise
- https://syndica.io/enterprise/calculator
- https://syndica.io/stake
- https://syndica.io/open-source/sig
- https://syndica.io/research?n=library
updated: '2026-05-25'
created: '2026-05-25T00:00:00.000Z'
modified: '2026-05-25'
position: Consuming
description: Syndica is a Solana-only infrastructure company building developer infrastructure for Web3. Its production platform
provides fault-tolerant, load-balanced Solana JSON-RPC over HTTP and WebSocket from four global regions, plus ChainStream
— a real-time JSON-RPC streaming API that consolidates transaction, slot, and block updates from multiple validators using
a "fastest wins" strategy with optional cross-validator verification. Syndica also operates a 0%-commission Solana staking
validator running Jito-Solana for MEV optimization, publishes Solana protocol research, and develops Sig — an open-source
Solana validator client written in Zig — together with companion libraries (rocksdb-zig, lsquic, boringssl-zig, zstd.zig,
base58-zig) under the Apache-2.0 license.
maintainers:
- FN: Kin Lane
email: info@apievangelist.com
X: apievangelist
url: https://apievangelist.com
specificationVersion: '0.23'
Syndica API — frequently asked questions
Does Syndica have an API?
Yes. APIs.io lists 4 APIs from Syndica, including Syndica Solana RPC (HTTP) API, Syndica Solana RPC (WebSocket) API and Syndica ChainStream API, and 1 more.
How do I authenticate with the Syndica API?
Syndica uses bearer-token authentication.
Is the Syndica API ready for AI agents?
Syndica has a Kin Score of 36.4 out of 100 (thin) and an Agent Readiness score of 19.1 (agent-aware), scored by API Evangelist on 2026-11-06.
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