# Cometh

**Canonical:** https://apis.io/providers/cometh/  
**Website:** https://www.cometh.io/  
**APIs profiled:** 3

Cometh is a French DeFi infrastructure provider building regulated, API-first crypto financial services for European fintechs, asset managers and corporates — custody, staking and yield, digital-asset trading, and payment settlement — on a composable ERC-4337 / Safe smart-account stack inside a MiCA-aligned regulatory perimeter (registered DASP; CASP licence AMF No. A2025-008; ISO 27001:2022). The publicly documented and callable surface today is Cometh Connect, a white-label ERC-4337 smart-wallet SDK with passkey (WebAuthn) signers, ERC-7579 session keys, social recovery and gasless transactions, served by an ERC-4337 Bundler JSON-RPC, a Paymaster JSON-RPC with sponsorship REST routes, and the Connect backend API. Every endpoint is gated at a Kong gateway by a project apikey (query string, front end) or apisecret (header, back end) issued from the app.cometh.io dashboard. The broader "DeFi-as-a-Service" API layer is sales-gated and its documentation is marked coming soon. Cometh was acquired by crypto market-data provider Kaiko, announced December 2025.

## Kin Score — 30.6 / 100 (thin)

Scored 2026-09-08 under rubric 0.20.0. Trend: flat (+0.0 from 30.6).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 64.3 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

Regulatory layer — **Payments**: 34.4 (matched via tags).

## 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

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

## APIs (3)

- **Cometh Connect Bundler API** — ERC-4337 bundler JSON-RPC endpoint. Accepts User Operations into the mempool, estimates UserOp gas, returns a UserOp and its receipt by hash, and lists supported EntryPoint addr...
- **Cometh Connect Paymaster API** — ERC-4337 paymaster JSON-RPC endpoint for transaction sponsorship (pm_sponsorUserOperation, pm_supportedEntryPoints) plus REST routes to read and register the sponsored contract ...
- **Cometh Connect API** — Connect backend API used by the Connect 4337 SDK for wallet lifecycle and recovery — wallet init and import, WebAuthn signer creation and address prediction, project parameters,...

## Security (3)

- **Cometh Authentication** — apiKey · 2 schemes
- **Cometh Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Cometh Trust Center** — ISO/IEC 27001:2022, MiCA / CASP licence, AMF No. A2025-008 (granted December 2025), Registered DASP (Digital Asset Service Provider)

## Plans (1)

- **Cometh Plans Pricing**

## Tags

Company, Blockchain, Account Abstraction, ERC-4337, Smart Wallet, Paymaster, Bundler, Passkeys, WebAuthn, Gasless Transactions, DeFi, Custody, Staking, Payments, JSON-RPC, MiCA, SAFe, Web3

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