Standards Sdk
Open-source, first-party SDK from the HOL Foundation for teams building credential issuance, presentation exchange, and trust registry workflows into their own
If your product has to speak HOL, start with the first-party SDK — code maintained by the same foundation publishing the specifications beats a feature-richer third-party reimplementation when conformance is on the line. The scope is deliberately narrow: it is building blocks, so budget engineering time and don't expect anything demo-ready. If you don't need HOL specifically, standard-agnostic identity vendors will get you further, faster.
Verified 12h ago · liveness 67/100 · cite: rightaichoice.com/tools/standards-sdk
- Developers building HOL-compatible identity wallets
- Issuers implementing HOL credential issuance workflows
- Verifiers integrating HOL-standard credential verification
- Enterprise teams with HOL conformance or certification requirements
- Non-developers looking for a ready-to-use identity application
- Projects that need a hosted identity platform rather than SDK building blocks
- Teams with no intention of aligning to HOL-specific standards
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Skip the HOL Standards SDK if you need a runnable identity app, a hosted platform, or a standard-agnostic stack — this is a library you build against, and its value depends entirely on your commitment to HOL.
A reference implementation is not a performance-tuned one, so budget engineering time for profiling and tuning if you expect high throughput.
The SDK is open source under the MIT license, so cost of entry is zero and the real budget line is engineering time. Compare it against commercial identity platforms, where you pay per-verification or per-seat and get a hosted service; here you pay your own engineers and get spec-aligned building blocks.
In short
Standards Sdk — Open-source, first-party SDK from the HOL Foundation for teams building credential issuance, presentation exchange, and trust registry workflows into their own. Best for Developers building HOL-compatible identity wallets, Issuers implementing HOL credential issuance workflows, Verifiers integrating HOL-standard credential verification. Free to use.
What people actually say about Standards Sdk — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
24 mentions across 3 sources (YouTube, GitHub, Lemmy) · researched Jul 30, 2026.
Average across the 3 sources that answered — each source counts once, not each post.
- +First-party implementation guarantees alignment with official HOL standards.
- +Modular architecture lets you adopt only needed components.
- +Comes with CLI tooling for testing and debugging.
- +Open source under MIT license with versioned releases.
- +Provides reference implementations for credential issuance, exchange, and trust registries.
- −Extremely narrow use case limited to HOL ecosystem.
- −Lacks support for other identity frameworks like W3C or DID.
- −No community-driven examples or tutorials outside official docs.
- −Unclear performance at scale due to lack of user reports.
- −Only TypeScript/JavaScript currently supported; no other languages.
Viability Score
How well maintained and how widely used is Standards Sdk? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: September 2026
How we score →Key Features
- Reference implementation of the HOL credential issuance standard
- Reference implementation of the HOL presentation exchange standard
- Reference implementation of the HOL trust registry standard
- Modular architecture so you adopt only the components you need
- TypeScript and JavaScript support
- Command-line interface for testing and debugging
- Versioned releases aligned with HOL standards updates
- Open source under the MIT license
- Client-side processing with no cloud dependency
- Auditable cryptographic operations
- Documentation and inline code comments
- No external runtime dependencies
- @hol-org/rb-client typed TypeScript REST client for the Registry Broker
- Registry Skills for Claude, Codex, Cursor and OpenClaw coding assistants
- HCS-11 registration workflow returning a UAID
About Standards Sdk
The HOL Standards SDK is the open-source developer library published by the HOL Foundation — the body that also maintains the Hiero Consensus Specifications under the Linux Foundation's Hiero Project. You use it to embed HOL standards into a product you are already building: credential issuance, presentation exchange, trust registry interactions, and the registry/identity plumbing that the HOL ecosystem's specifications describe. It is a library you compile into your stack, not an identity platform you log into. HOL's own site describes four standing subcommittees whose working-group output flows into open repositories — Agent Registries (agent listing schema, registry adapters, trust signal model), Agentic Payments (payment intent schema, settlement protocols, receipt verification), AI Privacy & Security (privacy guidance, security test vectors, trust frameworks), and Inter-Agent Communication & Governance (session handshake pattern, task lifecycle schema, routing protocols). The SDK is where those deliverables land as code, which means the implementation tracks the specification rather than an interpretation of it. That first-party lineage is the practical argument: conformance work gets cheaper and you inherit less risk from someone else's reading of the spec. Alongside the SDK, HOL ships three production developer surfaces for its Registry Broker: Registry Skills for AI coding assistants (documented for Claude, Codex, Cursor and OpenClaw, consumable as MCP context, project instructions, or native skill format), the typed TypeScript REST client @hol-org/rb-client, and an OpenAI Codex MCP stdio plugin (@hashgraphonline/registry-broker-codex-plugin) that adds delegate and summon operations. The broker workflow it supports runs Discover, Delegate, Register, Interact. It suits wallet providers, issuers, verifiers, identity and attestation vendors, and enterprise teams with HOL conformance obligations. TypeScript/JavaScript is the documented starting point, and a CLI covers testing and debugging. Processing is client-side with auditable cryptographic operations and no cloud dependency. If you need a runnable identity app or a standard-agnostic stack, this is the wrong shape of tool.
Behind the Verdict
The distinguishing fact about the HOL Standards SDK is who publishes it. HOL maintains the Hiero Consensus Specifications as part of the Hiero Project under Linux Foundation Decentralized Trust, and its standards program runs four standing subcommittees — Agent Registries, Agentic Payments, AI Privacy & Security, and Inter-Agent Communication & Governance. Deliverables from those working groups land in open repositories as specifications and reference implementations. When you adopt the SDK you are adopting the same artifact the spec authors write, which is the thing that actually shortens a conformance review: there is no gap between what the standard says and what the library does, because the same organisation is responsible for both. The rest of the ecosystem is more developed than the SDK alone suggests. HOL's Registry Broker is a live universal index and routing layer for AI agents that indexes across seven protocols without requiring participation, and it is exposed through three surfaces a working engineer can use today: Registry Skills that teach an AI coding assistant how to search, register and chat through the broker API (documented for Claude, Codex, Cursor and OpenClaw, consumable as MCP context, project instructions or native skill format), the typed TypeScript client @hol-org/rb-client covering discovery, registration, chat, delegation and analytics, and an OpenAI Codex MCP stdio plugin that adds delegate and summon. Builder workflows are laid out as Discover, Delegate, Register, Interact — keyword and semantic search across indexed agents, ranked routing of a task to the most capable candidate, HCS-11 registration with a UAID returned in one structured workflow, and cross-protocol sessions through a single API. If you are wiring an agent-facing product into a registry layer, those surfaces are the practical starting point. The honest weaknesses are scope and maturity. The SDK is a reference implementation, not a throughput-optimised library, so high-volume scenarios may need performance work. TypeScript/JavaScript is the documented language, and anything else means wrapping or porting. Everything runs client-side, which privacy-sensitive and regulated buyers like and which also means there is no cloud service to lean on. And the whole proposition is conditional on a commitment to HOL — the value is standards alignment, so if you are not building to HOL, the alignment is worth nothing to you. The partner program is worth understanding even if you only consume the SDK. It is invite-only, reviewed within 48 hours, and lists 30+ founding partners spread across registries and identity (GoDaddy, Skale, Intuition, Certisyn), payments (Todaq, HashPack, Bonzo Finance, droplinked), privacy and trust (Horizen Labs, OpenMatter Network), and communication (XMTP). Partners co-author specifications and get early access to reference implementations. You do not need to be a partner to use the open-source code, but the partner list is the
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Real-world workflow fit
Concrete scenarios for the personas Standards Sdk actually fits — and what changes day-one when you adopt it.
You pull the issuance and presentation-exchange modules into an existing TypeScript wallet, then use the CLI to exercise issuance and exchange flows locally before they touch a testnet.
Outcome: Working HOL-compliant credential flows inside your own wallet codebase, with cryptographic operations you can audit line by line.
You build a verifier that accepts HOL presentations and checks them against your trust registry client, pulling only the components your verification path actually touches.
Outcome: A verifier that speaks HOL standards directly instead of reimplementing the cryptography from the specification text.
You use the typed @hol-org/rb-client to search indexed agents, route a task to the best-ranked candidate, and register your own agent through the HCS-11 workflow to get a UAID.
Outcome: Your agent is discoverable through the Registry Broker and can delegate work to other agents across protocol boundaries through one API.
Use Cases
- Integrate HOL credential issuance into an identity system you already operate.
- Verify HOL presentations from holders inside a verifier application.
- Build a trust registry client on the standards-conformant implementation.
- Audit your own HOL implementation against the reference SDK.
- Prototype a HOL-compatible wallet using the CLI testing tools.
- Teach an AI coding assistant to search, register and chat through the Registry Broker API.
- Register an agent and obtain a UAID through the HCS-11 workflow.
Limitations
- The SDK is documented for TypeScript/JavaScript; other languages require wrapping or porting.
- It is a reference implementation rather than a production-optimised library, so high-throughput scenarios may need performance tuning.
- All processing is client-side with no cloud service included, so there is no hosted runtime to fall back on.
- Because the value is alignment with HOL standards, teams not committed to HOL get little from it.
- HOL's site presents the standards program as partner-driven and invite-only, with 30+ founding partners and four standing subcommittees — the specifications and reference implementations come out of working groups rather than a fixed released product, so what exists at any moment depends on working-group output.
as of 2026-09-28
Verification history
We have re-verified Standards Sdk 12 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
- — re-checked, vendor evidence unchanged
Showing the 6 most recent of 12 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Standards Sdk tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Open Source (MIT)
$0
Ideal for
Developers, wallet providers, issuers and enterprise conformance teams willing to write code rather than buy a hosted identity service.
What this tier adds
Starting tier — the SDK is free under MIT, with reference implementations of HOL credential issuance, presentation exchange and trust registry standards, TypeScript/JavaScript support and a debugging CLI.
Where the pricing makes sense
The company stage and team size where Standards Sdk's pricing actually pencils out — and where peers do it cheaper.
The SDK is open source under the MIT license, so cost of entry is zero and the real budget line is engineering time. Compare it against commercial identity platforms, where you pay per-verification or per-seat and get a hosted service; here you pay your own engineers and get spec-aligned building blocks.
Setup time & first value
How long it actually takes to get something useful out of Standards Sdk — broken out by persona, not the marketing-page minute.
A TypeScript developer comfortable with the identity domain should reach a first working issuance or presentation flow in a day or two, because the SDK installs like any npm library and the CLI tests locally. Reaching conformance-grade integration is measured in weeks, not hours — it depends on how much of your existing identity plumbing has to be rewired around HOL standards.
Switching to or from Standards Sdk
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From hand-rolled HOL implementation: replace your own cryptography and message handling with the spec-author reference modules.
- →From a third-party HOL wrapper: swap to the first-party SDK to eliminate interpretation drift between your code and the published standard.
- →From a hosted identity platform: extract the issuance and verification logic you need and run it client-side with the SDK.
- ↗To a hosted identity platform: move issuance, verification and trust registry calls behind a vendor API where you need an admin console and SLA.
- ↗To a standard-agnostic identity stack: replace HOL-specific modules with a vendor whose credentials are not tied to the HOL framework.
Integrations
Resources & Guides
Tutorials & Learning
YouTube returned 6 videos for “Standards Sdk”, and we withheld 6: 6 did not mention Standards Sdk. We are showing none, because we could not prove any of them are about Standards Sdk.
Official links
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Featured Head-to-Head Comparisons
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Voyage AI and Standards SDK serve completely different needs. Choose Voyage AI if you're building an enterprise RAG pipeline that demands high-accuracy retrieval on specialized domains like finance or legal, and you can invest in custom pricing. Choose Standards SDK if you're a developer implementing HOL decentralized identity standards and need a free, open-source reference implementation.
Standards Sdk vs Temporal Ai
Choose Temporal AI if you need bulletproof reliability for long-running workflows and AI agents; choose Standards SDK if you are implementing HOL decentralized identity standards. They solve entirely different problems and are not direct competitors.
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Frequently Asked Questions
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