# Topl

**Canonical:** https://apis.io/providers/topl/  
**APIs profiled:** 1

Topl was an impact-technology company founded in 2017 out of Rice University and based in Houston, Texas, building a proof-of-stake blockchain that let organizations prove ethical and sustainable practices on-ledger. It raised a $3M seed in 2020 and a $15M Series A in 2022, and shipped a real developer platform: the Bifrost node, the Genus indexer, the Brambl SDK family for Scala, TypeScript, JavaScript and Dart, and the brambl-cli client. In late 2023 the company rebranded to Apparatus and repositioned around Thunder, a Bitcoin Layer 2. It appears to have wound down after that — the last first-party artifact of any kind shipped on 2024-09-26, all ten remaining public repositories are archived, every documentation and API host now fails to resolve, and the topl.co domain lapsed and was re-registered by an unrelated owner on 2024-12-30. What survives, and what this profile is built from, is the contract itself: a 38-file proto3 module defining 6 gRPC services, 30 RPCs and 138 messages, still downloadable from the Buf Schema Registry, plus the published SDKs and container images.

## Kin Score — 16.9 / 100 (emerging)

Scored 2026-09-02 under rubric 0.18.0. Trend: flat (+0.0 from 16.9).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 0.0 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 35.7 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 5.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Open access — onboarding: open, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **Apparatus (Topl) Node and Genus gRPC API** — The gRPC interface to the Apparatus (Topl) blockchain: NodeRpc on the Bifrost full node for submitting transactions, reading blocks and following the chain tip, and the Genus in...

## Security (1)

- **Topl Authentication** — 0 schemes

## Plans (1)

- **Topl Plans Pricing**

## Tags

Company, Blockchain, Distributed Ledger, gRPC, Protobuf, Web3, Proof of Stake, Sustainability, Impact, Tokenization, Wound Down

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/topl/). Scores are computed from the provider's own public artifacts under a published rubric.