aid: cometh name: Cometh description: >- 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. image: https://framerusercontent.com/images/Q1Csh4cl9JXyPBmGbxE2xtSPpFE.png url: https://raw.githubusercontent.com/api-evangelist/cometh/refs/heads/main/apis.yml x-type: company x-source: serena-portfolio x-tier: stub x-tier-reason: portfolio-lead specificationVersion: '0.23' created: '2026-08-17' modified: '2026-08-17' tags: - Company - Blockchain - Account Abstraction - ERC-4337 - Smart Wallet - Paymaster - Bundler - Passkeys - WebAuthn - Gasless Transactions - DeFi - Custody - Staking - Payments - JSON-RPC - MiCA - SAFe - Web3 tags_raw: - Company - Blockchain - account-abstraction - erc-4337 - smart-wallet - paymaster - bundler - passkeys - webauthn - gasless-transactions - defi - custody - staking - payments - json-rpc - mica - safe - web3 apis: - name: Cometh Connect Bundler API description: >- 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 addresses. One endpoint per EVM chain, addressed by chain id in the path, authenticated with a project apikey in the query string. humanURL: https://docs.cometh.io/bundler/bundler-api baseURL: https://bundler.cometh.io/{chainId} tags: - ERC-4337 - Bundler - Account Abstraction - JSON-RPC - Blockchain tags_raw: - erc-4337 - bundler - account-abstraction - json-rpc - blockchain properties: - type: Documentation url: https://docs.cometh.io/bundler/bundler-api - type: APIReference url: https://docs.cometh.io/bundler/bundler-api - type: Authentication url: authentication/cometh-authentication.yml - type: Conventions url: conventions/cometh-conventions.yml - name: Cometh Connect Paymaster API description: >- ERC-4337 paymaster JSON-RPC endpoint for transaction sponsorship (pm_sponsorUserOperation, pm_supportedEntryPoints) plus REST routes to read and register the sponsored contract addresses and sponsored chains of a project. Chain id in the path; reads use a project apikey in the query string, writes use an apisecret from the back end. humanURL: https://docs.cometh.io/paymaster/paymaster-api baseURL: https://paymaster.cometh.io/{chainId} tags: - ERC-4337 - Paymaster - Gasless Transactions - JSON-RPC - Blockchain tags_raw: - erc-4337 - paymaster - gasless-transactions - json-rpc - blockchain properties: - type: Documentation url: https://docs.cometh.io/paymaster/paymaster-api - type: APIReference url: https://docs.cometh.io/paymaster/paymaster-api - type: Authentication url: authentication/cometh-authentication.yml - name: Cometh Connect API description: >- 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, relayed transaction status, and the social recovery flow (start, start-with-shared, finalize). Recovery routes are apisecret-protected and documented as server-to-server calls. humanURL: https://docs.cometh.io/advanced/social-recovery baseURL: https://api.4337.cometh.io tags: - Smart Wallet - Account Abstraction - Passkeys - WebAuthn - social-recovery tags_raw: - smart-wallet - account-abstraction - passkeys - webauthn - social-recovery properties: - type: Documentation url: https://docs.cometh.io/advanced/social-recovery - type: Authentication url: authentication/cometh-authentication.yml - type: Sandbox url: sandbox/cometh-sandbox.yml maintainers: - FN: Kin Lane email: kin@apievangelist.com - FN: APIs.json email: info@apis.io common: - type: DomainSecurity url: security/cometh-domain-security.yml - type: Website url: https://www.cometh.io/ - type: Documentation url: https://docs.cometh.io/ - type: DeveloperPortal url: https://app.cometh.io/ - type: APIReference url: https://docs.cometh.io/bundler/bundler-api - type: GettingStarted url: https://docs.cometh.io/quick-start/getting-started - type: SignUp url: https://app.cometh.io/register?product=connect - type: GitHubOrganization url: https://github.com/cometh-hq - type: StatusPage url: https://status.cometh.io/ - type: TrustCenter url: https://security.cometh.io/ - type: Compliance url: https://security.cometh.io/ - type: Twitter url: https://x.com/Cometh - type: LinkedIn url: https://www.linkedin.com/company/comethstudio - type: YouTube url: https://www.youtube.com/@comethio - type: LLMsTxt url: llms/cometh-llms.txt - type: Packages url: packages/cometh-packages.yml - type: SDKs url: packages/cometh-packages.yml - type: Authentication url: authentication/cometh-authentication.yml - type: Conventions url: conventions/cometh-conventions.yml - type: Conformance url: conformance/cometh-conformance.yml - type: Lifecycle url: lifecycle/cometh-lifecycle.yml - type: Sandbox url: sandbox/cometh-sandbox.yml - type: Plans url: plans/cometh-plans-pricing.yml - type: RateLimits url: rate-limits/cometh-rate-limits.yml x-enrichment: date: '2026-08-17' status: enriched artifacts_added: 13 pass: local-v1