CATEGORY
Asynchronous 9,790 crates
Data as of 2026-07-25 (crates.io database dump, timestamp 2026-07-25T02:00:36Z). Source: crates.io · db-dump.tar.gz · methodology & corrections.
datum-cdcPostgreSQL logical-replication CDC sources for Datum streams295Apache-2.0
zakura-rpcThe Zakura node's JSON Remote Procedure Call (JSON-RPC) interface. Internal crate, published to support cargo install zakura295MIT OR Apache-2.0
aeon-market-scanner-rsCEX/DEX market scanner: fetch prices, stream WebSocket updates, and find arbitrage opportunities.294Apache-2.0
openraft-rt-monoiomonoio AsyncRuntime support for Openraft294MIT OR Apache-2.0
ollama-sdk-macrosAn idiomatic, unofficial Rust client for the Ollama API with support for streaming, tool calling, and custom transports.294MIT
minion-engineAI workflow engine that orchestrates Claude Code CLI — automate code review, refactoring, and PR creation with YAML workflows294MIT
wauldoOfficial Rust SDK for Wauldo — Verified AI answers from your documents293MIT
atomr-agents-stt-runtime-deepgramDeepgram STT backend (REST + WebSocket) for atomr-agents.293Apache-2.0
atomr-agents-stt-runtime-openaiOpenAI Whisper / gpt-4o-transcribe REST backend for atomr-agents speech-to-text.293Apache-2.0
sqlmodel-poolConnection pooling for SQLModel Rust using asupersync293LicenseRef-MIT-OpenAI-Anthropic-Rider
zakura-tower-batch-controlTower middleware for batch request processing. Internal Zakura fork, published to support cargo install zakura293MIT
catsuHigh-performance embeddings client for multiple providers292Apache-2.0
volga-open-apiVolga Open API Integration292MIT
cortexai-toolsBuilt-in tools for Cortex AI agents: calculator, web search, file I/O and more291Apache-2.0
cortexai-providersLLM provider integrations for Cortex: OpenRouter, OpenAI, Anthropic and more291Apache-2.0
parsql-cliCommand-line interface for parsql database toolkit290MIT OR Apache-2.0
cargo-nidusCommand-line project generator and inspection tooling for Nidus applications.290MIT OR Apache-2.0
auto-diErgonomic async-aware automatic dependency injection for Rust289MIT
assay-vaultVault module for assay-engine: KV v2, transit, dynamic credentials, Bitwarden-aligned vaults + collections + items + folders,…289Apache-2.0
atomr-agents-stt-runtime-assemblyaiAssemblyAI STT backend (REST + Universal-Streaming WebSocket) for atomr-agents.289Apache-2.0
tokio-fsm-macrosProc macro for generating Tokio async finite state machines289MIT
aion-serverAion workflow server library: HTTP, gRPC, WebSocket, and worker endpoints. Run it with the `aion` binary from the aion-cli crate.289AGPL-3.0-only
email-transportTransport abstraction for outbound email288MIT
sqlmodel-sessionSession and Unit of Work for SQLModel Rust288LicenseRef-MIT-OpenAI-Anthropic-Rider
arifaRedis-based realtime pub/sub engine for WebSocket applications288Apache-2.0
hanabi-cliCLI utilities from interacting with a Hanabi server287MIT
atomr-agents-tts-runtime-elevenlabsElevenLabs TTS backend (REST + WebSocket streaming + voice cloning + SFX) for atomr-agents.287Apache-2.0
atomr-agents-stt-runtime-whisperLocal whisper.cpp speech-to-text backend (via whisper-rs) for atomr-agents.287Apache-2.0
zakura-tower-fallbackA Tower service combinator that sends requests to a first service, then retries processing on a second fallback service if the…287MIT OR Apache-2.0
nagisaRust 的 QQ 机器人框架,支持 OneBot v11 和 Milky286MIT OR Apache-2.0
rubbo-serializationRust implementation of Apache Dubbo 3. High-performance RPC framework with Triple protocol.286MIT
faucet-source-mysql-cdcMySQL binlog (CDC) source for the faucet-stream ecosystem286MIT OR Apache-2.0
nestrs-wsWebSocket extension crate for nestrs.286MIT OR Apache-2.0
cruxai-coreCore types, traits, and runtime for the cruxai agentic DSL286MIT
async-graphql-wasm-parserGraphQL query parser for async-graphql-wasm285MIT OR Apache-2.0
nt-executionOrder execution and broker integration for Neural Trader - supports Alpaca, Interactive Brokers, and more285MIT OR Apache-2.0
openraft-rt-compiocompio AsyncRuntime support for Openraft285MIT OR Apache-2.0
rubbo-macroRust implementation of Apache Dubbo 3. High-performance RPC framework with Triple protocol.285MIT
rubbo-registryRust implementation of Apache Dubbo 3. High-performance RPC framework with Triple protocol.285MIT
z8run-coreFlow engine, DAG scheduler, and 35+ built-in nodes for z8run — visual workflow automation285Apache-2.0 OR MIT
layer-clientProduction-grade async Telegram client: updates, bots, flood-wait, dialogs, messages285MIT OR Apache-2.0
celers-canvasWorkflow primitives for CeleRS (Chain, Chord, Group, Map)284Apache-2.0
atomr-agents-channel-provider-whatsappWhatsApp Business Cloud API provider for atomr-agents channels. Outbound REST, HMAC-SHA256 webhook verification, and two-step…284Apache-2.0
babelforce-manager-sdkRust SDK for the babelforce manager APIs — auth, user & agent management, call reporting, metrics, and task automations.284Apache-2.0
altair-otelOne-call OpenTelemetry setup with tracing-subscriber integration283MIT
ssh-commander-coreAsync Rust domain layer for SSH, SFTP, FTP/FTPS, PostgreSQL, and connection management — the engine behind midnight-ssh.283MIT OR Apache-2.0
nestrs-microservicesMicroservice transport and client primitives for nestrs.283MIT OR Apache-2.0
brazeUnofficial Rust SDK for Braze APIs283MPL-2.0
rustrade-supervisorService lifecycle supervisor with backoff and circuit breakers for rustrade283MIT
daimon-plugin-opensearchOpenSearch k-NN backed VectorStore plugin for the Daimon AI agent framework283MIT OR Apache-2.0
atomr-agents-channel-provider-discordDiscord provider for atomr-agents channels. Gateway WebSocket (default) or Interactions webhook mode with Ed25519 signature…282Apache-2.0
sourcery-coreCore types and traits for the Sourcery library282GPL-3.0-only
lighter-sdkRust SDK for interacting with the Lighter exchange over REST, WebSocket, and signer-backed transaction flows.282Apache-2.0
oxirpc-coreCore types and error for OxiRPC282Apache-2.0
ttlogHigh-performance lock-free tracing and logging system281MIT
ws-reconnect-clientAsync WebSocket client with automatic reconnection, exponential backoff, and typed JSON message parsing281MIT
a3s-cronCron scheduling library for A3S with natural language support281MIT
stdiobus-coreCore types and protocol models for stdio_bus - AI agent transport layer281Apache-2.0
mailledger-imapProduction-quality IMAP client library implementing RFC 9051 (IMAP4rev2)280MIT
jdb_fsHigh-performance log-structured file storage / 高性能日志结构文件存储280MulanPSL-2.0
datum-cliCommand-line interface for the Datum Control Protocol280Apache-2.0
atomr-agents-channel-provider-signalSignal provider for atomr-agents channels via signal-cli JSON-RPC bridge (Unix socket or TCP).280Apache-2.0
agent-framework-coreCore abstractions for agent-framework-rs: messages, chat clients, agents, tools, threads, middleware, memory, and workflows280MIT
matrix-lite-rsProduction-ready Matrix protocol implementation with Redis backend, E2EE (Olm/Megolm), and WASM support for scalable real-time…279MIT OR Apache-2.0
streamsafeType-safe async pipeline framework for data processing279Apache-2.0
folk-runtime-embedEmbedded PHP runtime for Folk — PHP interpreter runs in-process via FFI279MIT
ailoop-coreCore vocabulary (messages, streams, hooks, middleware) for the ailoop SDK279MIT OR Apache-2.0
teloxide-ngAn elegant Telegram bots framework for Rust278MIT
precise_rate_limiterA high-performance, precise rate limiter using tokio channels and atomic operations278Apache-2.0
oyui-taskerA macro-driven event loop and background task orchestration framework for asynchronous Rust applications.278MIT OR Apache-2.0
agnosaiProvider-agnostic AI orchestration framework278GPL-3.0-only
rusty-catAsync HTTP client for resumable file upload and download.278MIT
mcpkit-rs-policyRust SDK for Model Context Protocol277Apache-2.0
ai-sdk-openaiOpenAI provider for AI SDK - GPT, DALL-E, Whisper, and Embeddings277MIT OR Apache-2.0
libquarkpanAsync Rust client library for Quark Drive upload, download, listing, and folder creation277GPL-3.0-only
openwire-coreShared primitives, policies, bodies, and transport traits for OpenWire276MIT
oxiditeA modern, high-performance framework for Rust.276MIT
anybusA serverless message bus for communicating between Rust applications easily (only IPC currently)276MIT
ash-flareFault-tolerant supervision trees for Rust with distributed capabilities inspired by Erlang/OTP276Apache-2.0
fugle-marketdata-coreInternal kernel for the Fugle market data SDK. End users should depend on `fugle-marketdata` instead.276MIT OR Apache-2.0
skg-secretSecret resolution traits and types for skelegent275MIT OR Apache-2.0
rutorrentRuTorrent is a lightweight API that downloads magnet links and asynchronously transfers files to a remote server over SSH via…274MIT
oxify-storageSQLite-based storage layer for OxiFY execution history, metrics, and caching273Apache-2.0
rust-tg-bot-rawPure Telegram Bot API types and methods for Rust -- a faithful port of python-telegram-bot's core layer273LGPL-3.0-only
codex-client-sdkRust SDK for embedding the Codex agent via CLI-over-JSONL transport273Apache-2.0
beetry-macrosInternal beetry crate. For the public API, check the beetry crate.273MIT
starlang-supervisorSupervisor pattern for Starlang273MIT OR Apache-2.0
motosan-chat-aimotosan-ai adapter (LlmClient) for motosan-chat273MIT
strevEvent-driven pub/sub messaging library with compile-time ack safety273MIT
aion-integrationsHarness-integration SDK for Aion: the AgentHarness trait plus reusable building blocks for making an agent harness a first-class…272AGPL-3.0-only
xerv-coreWorkflow orchestration core: memory-mapped arena, write-ahead log, traits, and type system272Apache-2.0
oxisql-postgresPure-Rust PostgreSQL backend for OxiSQL via tokio-postgres + OxiTLS (no libpq, no OpenSSL)272Apache-2.0
altair-concurrentType-safe parallel execution of named async tasks with cancellation and per-task tracing271MIT
kafka_clientA pure Rust Kafka client library with SASL authentication support271Apache-2.0 OR MIT
lazyflow-macrosProcedural macros for lazyflow -- #[operator], #[pull_operator], #[pipe_fn]271MIT
disposition_input_ir_model`disposition` diagram generator input to IR mapping data types.271MIT OR Apache-2.0
disposition_taffy_modelData types for disposition to work with taffy.271MIT OR Apache-2.0
nidus-dashboardEmbedded dashboard for Nidus applications.271MIT OR Apache-2.0
kova-sdkAsync-first Rust library for building LLM-powered agents with tool calling, streaming, MCP, and multi-agent orchestration271Apache-2.0
oharness-llmLlm trait + middleware helper traits for open-harness270MIT OR Apache-2.0
rbp-gameroomAsync game coordinator, player implementations, and hand history270MIT
atomr-agents-avatar-coreAvatar domain types for real-time, embodied agents: ARKit blendshape weights, viseme→blendshape mapping, AvatarFrame timecoding,…270Apache-2.0
altair-retryAsync retry with exponential backoff, auto-traced via the tracing crate269MIT
tokio-jrpcSimple tokio-based async JSON-RPC 2.0 client and server.269MIT
warpdrive-proxyA high-performance HTTP proxy with PostgreSQL coordination and distributed caching269MIT
neuron-op-reactReAct operator for neuron — model + tools in a reasoning loop269MIT OR Apache-2.0
tokio-multilockDeadlock-safe concurrent lock acquisition269LGPL-3.0-or-later
camel-component-surrealdbSurrealDB multi-model database component for rust-camel269Apache-2.0
md_downloaderAsynchronous Rust downloader for MediaFire files and folders, built on top of md_api.268MIT
deltaflowThe embeddable workflow engine. Type-safe, Elixir-inspired pipelines.268MIT
neuron-state-memoryIn-memory StateStore implementation for neuron268MIT OR Apache-2.0
goveeAsync Rust library for controlling Govee smart lighting devices via cloud and local LAN APIs268Apache-2.0
baresync-coreSQLite-first sync runtime for Tauri apps268MIT
entelix-graph-deriveentelix proc-macro — #[derive(StateMerge)] for per-field Annotated<T, R> reducer composition on StateGraph state types268MIT
cpu_loadReal-time CPU load monitoring with intelligent core selection / 实时 CPU 负载监控与智能核心选择267MulanPSL-2.0
prax-pgvectorpgvector integration for the Prax ORM — vector similarity search, embeddings, and index management267MIT OR Apache-2.0
oxisql-mysqlPure-Rust MySQL backend for OxiSQL via mysql_async + OxiTLS (no libmysqlclient, no OpenSSL)267Apache-2.0
aoc_leaderbot_aws_libAWS-specific support library for aoc_leaderbot, an Advent of Code leaderboard-watching bot266MIT
beetryBehavior tree framework with a runtime, plugin system, and Beehive editor.265MIT
base64-ng-tokioOptional Tokio async helpers for base64-ng265MIT OR Apache-2.0
jamjet-agentsJamJet agent registry, lifecycle, and Agent Card management265Apache-2.0
reratui-hooksReact-inspired hooks for state management and side effects in Reratui TUI applications265MIT OR Apache-2.0
aoc_leaderbot_slack_libSlack-specific support library for aoc_leaderbot, an Advent of Code leaderboard-watching bot265MIT
compact-waitgroupA compact asynchronous WaitGroup synchronization primitive.265MIT OR Apache-2.0
stratneo-nautilus-sandboxSandbox execution adapter for the Nautilus trading engine264LGPL-3.0-or-later
ssh-commander-pgAsync PostgreSQL connection pool, introspection, and query execution for ssh-commander-core. Dials a plain host:port and is…264MIT OR Apache-2.0
fharnessHarness library for the fiddlesticks agent harness framework264MIT
tireaRust AI agent framework with typed state, CRDT conflict resolution, and multi-protocol serving264MIT OR Apache-2.0
datum-cluster-shardingDatum cluster sharding core: envelopes, coordinator, regions, and entities264Apache-2.0
llm-tool-runtimeProvider-agnostic tool contracts, registry, dispatch, and receipt plumbing for llm-pipeline264MIT
zerodds-rpcDDS-RPC 1.0 (formal/16-12-04): Requester/Replier-Runtime, Service-Mapping (IDL→Wire), Topic-Naming,…264Apache-2.0
ringkernel-ecosystemEcosystem integrations for RingKernel - actors, web frameworks, data processing, ML263Apache-2.0
kernexUmbrella crate for the Kernex AI agent runtime. Re-exports kernex-runtime.263Apache-2.0 OR MIT
agentsdkA lean, OpenAI-compatible AI SDK for Rust.262MIT
night-fury-daemon-coreGeneric Unix-socket daemon plumbing — SessionDriver trait, SessionRegistry with idle reaper, IPC protocol, auto-spawn helper262MIT OR Apache-2.0
idiolect-indexerFirehose consumer for dev.idiolect.* records, built on top of tapped. Decodes commits into AnyRecord and dispatches them through…261MIT
agent-framework-openaiOpenAI (and OpenAI-compatible) chat client for agent-framework-rs261MIT
cloudiful-serverRust web server bootstrap crate with Actix and Axum adapters260Apache-2.0
kevy-client-asyncAsync client for kevy — runtime-agnostic core with feature-gated tokio / smol / async-std transports; mirrors the blocking…260Apache-2.0 OR MIT
tronz-contractABI bindings and contract instances for the tronz TRON SDK.260MIT OR Apache-2.0
camel-component-llmLLM chat, embeddings, tool calling, multi-turn, response cache, cost observability, retry, and concurrency control via OpenAI,…260Apache-2.0
elara-runtimeELARA Protocol - Node runtime with event loop, session management, and stream processing259MIT OR Apache-2.0
gqlrs-valueGraphQL value for gqlrs259MIT OR Apache-2.0
pg-poolAsync PostgreSQL connection pool built on pg-wired.259MIT OR Apache-2.0
quex-driverLow-level async database drivers used by quex.259MIT OR Apache-2.0
openwire-tokioTokio executor, timer, DNS, TCP, and I/O adapters for OpenWire258MIT
throttle-netGeneral-purpose outbound throttling and resilience for Rust: multi-algorithm rate limiting, multi-dimensional and cost-aware…258Apache-2.0 OR MIT
ciqadamqClustered MQTT broker built on RMQTT with a REST API for user management, per-user topic ACLs, and message expiry258AGPL-3.0-only
oxisql-poolAsync connection pooling for OxiSQL — deadpool-postgres, custom MySQL manager, embedded no-op (Pure Rust)258Apache-2.0
vidi-macrosThe proc macros for Vidi257MIT
alopex-chirps-mockMock implementations for testing Alopex Chirps components257Apache-2.0 OR MIT
axocoatl-isolationTiered isolation layer for Axocoatl tool execution (Wasmtime + youki OCI + Firecracker)257Apache-2.0
argentor-channelsCommunication channel abstractions (WebSocket, Slack) for Argentor257AGPL-3.0-only
openai-agents-core-rsCore runtime primitives for openai-agents-rust.256MIT
svnAsync Rust SVN client for Subversion svn://, svn+ssh://, and ra_svn workflows.256MIT
gqlrs-parserGraphQL query parser for gqlrs255MIT OR Apache-2.0
diselfA Discord self-bot library for Rust255MIT
behest-eventEvent types, EventActions, and Hook system for the behest agent runtime255MIT OR Apache-2.0
oxiquic-coreOxiQUIC core types: error, StreamId, ConnectionStats.255Apache-2.0
motosan-workflow-skillSkill system and ACP integration for motosan-workflow254MIT
polluxQueue worker pool254MIT
ai-sdk-provider-utilsUtility functions and helpers for AI SDK providers254MIT OR Apache-2.0
wesichain-agentRust-native LLM agents & chains with resumable ReAct workflows254Apache-2.0 OR MIT
emcyphal-encodingTransfer encoding and decoding for Emcyphal network stack254MIT OR Apache-2.0
lightbenchA transport-agnostic benchmarking framework for latency and throughput measurement254MIT OR Apache-2.0
vidi-handlersThe handlers for Vidi253MIT
ringoloAn asynchronous runtime built on top of io-uring.253Apache-2.0
capsec-tokioAsync capability-gated wrappers for tokio — the async counterpart to capsec-std253Apache-2.0
purwa-corePurwa framework kernel — router, middleware, and HTTP primitives253MIT
durable-lambda-coreCore replay engine, types, and operation logic for AWS Lambda durable execution in Rust253MIT OR Apache-2.0
varchainAsync-only chain-based variable lookup engine, support no_std with alloc.252MIT
kavach-coreCore execution boundary engine, gate, verdicts, identity, policy, drift, invariants252LicenseRef-Elastic-2.0
ecson_coreCore types and application runner for the Ecson server framework251MIT
foxessRust library for communication with FoxESS Cloud251non-standard
xiaoyong-valueCollection of sharing state primitives for async contexts (both Sync and !Sync)250MIT OR Apache-2.0
gqlrs-deriveMacros for gqlrs250MIT OR Apache-2.0
openai-coreRust SDK for OpenAI-compatible ecosystem249MIT
flowsdkSafety-first, realistic, behavior-predictable messaging SDK for MQTT and more.249MPL-2.0
atomr-agents-coding-cli-isolatorIsolator trait + Local and Docker implementations for the coding-cli harness. Spawns CLI processes on the host or in a container…249Apache-2.0
inferd-clientRust client for the inferd local-inference daemon: generation (length-prefixed v2 framing, grammar support), embeddings (NDJSON),…249MIT
celers-broker-postgresPostgreSQL broker implementation for CeleRS with FOR UPDATE SKIP LOCKED248Apache-2.0
gqlrsA GraphQL server library implemented in Rust248MIT OR Apache-2.0
behest-providerProvider-neutral model contracts and registry for the behest agent runtime248MIT OR Apache-2.0
enki-runtimeA Rust-based agent mesh framework for building local and distributed AI agent systems247LicenseRef-Enki-NC
claude-code-client-sdkRust SDK for integrating Claude Code as a subprocess with typed APIs247Apache-2.0
ai-agents-observabilityObservability and tracing for AI Agents framework247Apache-2.0
firq-coreCore multi-tenant scheduler with DRR fairness, deadlines, and backpressure246MIT OR Apache-2.0
mecha10-runtimeRuntime supervisor for Mecha10 nodes - launching, monitoring, and lifecycle management246MIT
pincer-coreCore types and traits for pincer declarative HTTP client246MIT OR Apache-2.0
atomr-agents-coding-cli-vendor-claudeClaude Code adapter for the coding-cli harness: stream-json parser + concept projection (CLAUDE.md, skills, MCP, settings).246Apache-2.0
atomr-agents-web-search-toolGeneric `Tool` wrapper that exposes any `WebSearch` provider to atomr-agents agents and harnesses.246Apache-2.0
tasmor_libRust library to control Tasmota devices via MQTT and HTTP246MPL-2.0
serenity-simplifyA discord.py-ergonomic Discord bot API layered directly on serenity246MIT
qubit-httpGeneral-purpose HTTP infrastructure for Rust with unified client semantics, secure logging, and built-in SSE decoding245Apache-2.0
device-envoy-espBuild ESP32 applications with composable device abstractions245MIT OR Apache-2.0
vidiFast, robust, flexible, lightweight web framework for Rust244MIT
bitfoldA modern, high-performance reliable UDP networking library inspired by ENet, built with Rust244MIT
rskit-storageFile I/O, local storage, temp files, MIME detection, and storage backend traits244MIT
dubbo-rs-registryService registration and discovery abstraction for Apache Dubbo Rust244Apache-2.0
rskit-pipelineComposable async data pipelines via futures::Stream extension operators244MIT