Halborn
Halborn is a blockchain and digital-asset cybersecurity firm that sells professional security services rather than a developer product. Its assurance practice covers smart contract assessments, Layer 1 protocol reviews, code security audits, web application and cloud infrastructure penetration testing, red team exercises, and custody and key management assessments; its advisory practice covers AI security, blockchain architecture, compliance readiness, risk assessment, technical due diligence and technical training for banks, exchanges, custodians, tokenization platforms, stablecoin issuers, DeFi protocols, central banks and blockchain infrastructure providers. Halborn publishes its engagement results as a public audit repository, discloses zero-day findings under its own CVE assignment scope as a CVE Numbering Authority, and maintains BVSS, the Blockchain Vulnerability Scoring System. As of August 2026 it publishes no public API, no developer portal and no machine-readable contract; its Halborn ONE client platform at one.halborn.com is an invitation-only customer portal.
Halborn is profiled on the APIs.io network. Tagged areas include Company, Security, Cybersecurity, Blockchain, and Smart Contracts.
Halborn’s developer surface includes engineering blog, support, and 14 more developer resources.
Kin Score
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Halborn Rate Limits
RATE LIMITSSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Get Started 1
Portal, sign-up, and the first successful call
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Source (apis.yml)
Work with this as data
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MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for providers
9 MCP tools reach this
find_providersBrowse and filter every provider in the catalog.get_provider_artifactsEvery artifact this provider publishes, grouped by type.get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.get_provider_toolsEvery MCP tool they ship, with the operation each wraps.get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.get_provider_ratingPRO — composite, band, trend and facet scores.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
curl "https://apis.io/api/v1/providers/halborn"
curl "https://apis.io/api/v1/providers?limit=25"
curl "https://apis.io/api/v1/providers/halborn/operations?limit=25"
curl "https://apis.io/api/v1/providers/halborn/evidence"
Discovery needs no key. Ratings and market analysis are Pro.