# Cymbal

**Canonical:** https://apis.io/providers/cymbal/  
**Website:** https://cymbal.xyz  
**APIs profiled:** 0

Cymbal was a consumer blockchain data startup founded in 2022 in Menlo Park by Eric Feng, Nick Chang and others, building a "human readable" Ethereum block explorer with a visual, social interface and AI-generated conversational summaries of wallets, NFTs and transactions. The company raised $18.5M in 2023 from investors including First Round Capital, Coinbase Ventures, Solana Ventures, Patron, Acrew and GV. In July 2025 Yahoo acqui-hired the Cymbal team into a new AI research group. Cymbal published no public developer API or documentation surface; this API Evangelist profile is a GV-portfolio company record.

## Kin Score — 5.0 / 100 (minimal)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 5.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Cymbal Domain Security** — TLSv1.3 · DMARC

## Tags

Company, Consumer, Blockchain, Ethereum, Block Explorer, Web3, Crypto Data, Acquired

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