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.
axocoatl-actorActor-based agent runtime for Axocoatl, built on ractor339Apache-2.0
sambaSamba — typed rate-limited consumer primitive for pleme-io. Provides UpstreamApi trait, LeakyBucket pacing, and…339MIT
moonbeam-attributesAttribute macros for Moonbeam339MIT
neuron-typesCore traits for AI agents in Rust — Provider, Tool, and ContextStrategy without the framework buy-in338MIT OR Apache-2.0
purrgressA lightweight, async-ready hierarchical stage machine tailored for P2P networks and game state trees.337MIT
cachelito-asyncAsync caching library with LRU/FIFO/LFU/ARC/Random/TLRU/W-TinyLFU eviction policies for async/await functions337Apache-2.0
aerosocket-wasmWebAssembly support for AeroSocket337MIT OR Apache-2.0
tower-http-tracingTracing middleware to span annotated every HTTP request337BSL-1.0
raftoralFault-tolerant workflow orchestration library using embedded Raft consensus for Rust applications336MIT
echo_coreCore traits and types for the echo-agent framework336MIT
atomr-agents-parserOutput parsers + auto-repair + streaming partial-JSON for atomr-agents.336Apache-2.0
moondbRust client SDK for Moon — high-performance Redis-compatible server with vector search and graph engine336MIT
mofa-sdkMoFA SDK - Modular Framework for Agents. A standard development toolkit for building AI agents with Rust335Apache-2.0
modal-rsUnofficial Rust SDK for Modal.com - serverless cloud compute platform335MIT
axocoatl-coordinationAdaptive stigmergic task lattice coordination for Axocoatl multi-agent systems335Apache-2.0
ferric-fredA strongly-typed async Rust client for the FRED (Federal Reserve Economic Data) API.335MIT OR Apache-2.0
zakura-networkNetworking code for the Zakura node. Internal crate, published to support cargo install zakura335MIT
apcore-mcpMCP bridge for apcore — expose apcore modules as MCP tools334Apache-2.0
eden-skills-coreCore domain logic for eden-skills: config, plan, lock, reactor, adapter, registry, and safety334MIT
hydracache-clientRemote HydraCache client SDK over the stable external client protocol.334Apache-2.0
rain-engine-coreProvider-neutral event kernel for RainEngine334MIT
pg-wiredMinimal async PostgreSQL wire protocol v3 client: connection, extended query, pipelining, COPY, LISTEN/NOTIFY, TLS, SCRAM.334MIT OR Apache-2.0
starpcStreaming protobuf RPC framework334MIT
cs_mwc-libp2p-tokio-socks5TCP/IP (via a SOCKS5 proxy) transport protocol for libp2p333GPL-3.0
wstd-awsAWS rust sdk support for Wasm Components and WASI 0.2, based on wstd333Apache-2.0 WITH LLVM-exception
hyperfile-cleanerSegments cleaner implementation for Hyperfile333Apache-2.0
enact-runnerRobust agent loop runner for Enact — retries, compaction, multi-format parsing333MIT
atd-runtimeServer-side runtime for the ATD protocol: Tool trait, Registry, dispatch, Binding, Middleware, capability gate.333Apache-2.0
branchforgeGraph-first Rust runtime for durable LLM agents333MIT
kotoba-networkNetwork protocol implementation for Kotoba distributed system332MIT OR Apache-2.0
faucet-source-kafkaApache Kafka consumer source for the faucet-stream ecosystem332MIT OR Apache-2.0
html2pdf-apiThread-safe headless browser pool for high-performance HTML to PDF conversion with native Rust web framework integration.332MIT
swift-rs-coreCore domain models and utilities for SWIFT financial messaging in Rust331Apache-2.0
fsigA filesystem signal crate for monitoring, debouncing, and filtering events.331MIT
edgestore-tokioAsync Tokio integration for EdgeStore331MIT OR Apache-2.0
atomr-agents-stt-harnessSTT harness: an agentic streaming pipeline that diarizes, transcribes, and accumulates a conversation record aligned to agentic…331Apache-2.0
atomr-agents-cacheLLM cache (in-memory, semantic) + middleware integration.331Apache-2.0
gradio_client_rsAsync Rust client for Gradio apps330Apache-2.0
faucet-sink-stdoutStdout/stderr sink connector for the faucet-stream ecosystem330MIT OR Apache-2.0
prax-duckdbDuckDB database driver for Prax ORM - optimized for analytical workloads330MIT OR Apache-2.0
nexo-setupSetup wizard, capability inventory, and doctor command for Nexo.329MIT OR Apache-2.0
monocoque-rs-coreProtocol-agnostic messaging kernel with pluggable io_uring (compio), tokio, or smol I/O329MIT
device-envoyTop-level landing crate for device-envoy platform crates328MIT OR Apache-2.0
myelin-macrosProc macros for myelin — generates service plumbing from trait definitions328Apache-2.0 OR MIT
noesis-shipRust NATS communication platform for multi-agent AI systems328MIT
nestrsNestJS-like API framework for Rust on top of Axum and Tower.328MIT OR Apache-2.0
nexo-poller-toolsBuilt-in tools and builders for the Nexo poller (LLM turn, channel ops).328MIT OR Apache-2.0
nexo-poller-extExtension integration for the Nexo poller runtime.328MIT OR Apache-2.0
atomr-agents-ingestDocument loaders, text splitters, and CachedEmbedder for atomr-agents.328Apache-2.0
cel-memoryBackend-agnostic memory traits and value types for AI agents, with scoped retrieval, sessions, and governance hooks.328Apache-2.0
skg-contextContext strategy implementations for skg-turn327MIT OR Apache-2.0
rusmes-coreMailet processing engine for RusMES — composable mail processing pipeline with matchers, mailets, DKIM/SPF/DMARC, spam filtering,…327Apache-2.0
faucet-sink-gcsGoogle Cloud Storage sink connector for the faucet-stream ecosystem327MIT OR Apache-2.0
gearbox-rs-coreCore framework for Gearbox - dependency injection and HTTP routing327MIT
faucet-source-elasticsearchElasticsearch source connector for the faucet-stream ecosystem327MIT OR Apache-2.0
stout-fetchAsync download manager with progress bars, parallel transfers, and SHA256 verification326MIT
job-orchestratorAsynchronous job orchestrator for managing and routing payloads between services and computing resources with quota tracking326MIT
mixtape-anthropic-sdkMinimal Anthropic API client for the mixtape agent framework326MIT
gearbox-rs-macrosProcedural macros for Gearbox framework326MIT
faucet-source-mssqlMicrosoft SQL Server query source connector for the faucet-stream ecosystem326MIT OR Apache-2.0
faucet-sink-redisRedis sink connector for the faucet-stream ecosystem326MIT OR Apache-2.0
moonbeamA single-threaded-first async HTTP server326MIT
faucet-state-postgresPostgreSQL-backed StateStore for faucet-stream incremental replication326MIT OR Apache-2.0
motosan-workflow-modelData types, traits, and graph algorithms for motosan-workflow325MIT
joerlAn Erlang-inspired actor model library for Rust325MIT
murgamuA NestJS-inspired web framework for Rust325LGPL-3.0-or-later
openclaw-agentsAgent runtime and workflow engine for OpenClaw324MIT
faucet-sink-mysqlMySQL sink connector for the faucet-stream ecosystem324MIT OR Apache-2.0
borderless-storageA minimal S3-style object store with pre-signed URLs, chunked uploads, and a filesystem backend (based on Axum/Tokio).323MIT OR Apache-2.0
async-dropxA practical crate for async destructors in Rust323MIT
llm-edge-providersLLM provider adapters for OpenAI, Anthropic, Google, AWS, Azure323Apache-2.0
rpcnetRPC library based on QUIC+TLS encryption323MIT OR Apache-2.0
faucet-sink-sqliteSQLite sink connector for the faucet-stream ecosystem323MIT OR Apache-2.0
gorustGo-style concurrency in Rust - bringing Go-style concurrency patterns to Rust with familiar primitives like goroutines and…323MIT
async-observeAsync single-producer, multi-consumer channel that only retains the last sent value322Apache-2.0 OR MIT
ollama-sdkAn idiomatic, unofficial Rust client for the Ollama API with support for streaming, tool calling, and custom transports.322MIT
prax-scylladbScyllaDB database driver for Prax ORM - high-performance Cassandra-compatible database322MIT OR Apache-2.0
simple_download_utilityA simple async download utility with progress tracking, SHA1 validation, and concurrent multi-file downloads321MIT
smtc-tokioA simple, thread-safe library that connects your async Rust application (tokio) to the Windows System Media Transport Controls…321MIT
bullmq-officialA powerful, fast, and robust job queue for Rust backed by Redis321MIT
solti-runnerSolti SDK runner plugin trait.320Apache-2.0
hyperdirA container for inodes implemented as a Hyperfile320Apache-2.0
loom-rsWeaving threads together - A bespoke thread pool runtime combining tokio and rayon with CPU pinning capabilities320MIT
rediqA distributed task queue framework for Rust based on Redis320MIT OR Apache-2.0
faucet-sink-csvCSV file sink connector for the faucet-stream ecosystem320MIT OR Apache-2.0
gosub-sonarBrowser-agnostic priority-scheduled HTTP/HTTPS fetching library320MIT
zel_coreType-safe RPC framework built on Iroh with support for methods, subscriptions, notifications, and raw streams319MIT OR Apache-2.0
faucet-sink-mongodbMongoDB sink connector for the faucet-stream ecosystem319MIT OR Apache-2.0
faucet-state-redisRedis-backed StateStore for faucet-stream incremental replication319MIT OR Apache-2.0
vcs-mcpA Model Context Protocol (MCP) server exposing Git, Jujutsu, and GitHub/GitLab/Gitea operations as agent-callable tools, with…319MIT
ubl-sirpUBL SIRP: HTTP capsule+receipt, HMAC, idempotency, server for Universal Business Ledger.318MIT OR Apache-2.0
faucet-sink-parquetApache Parquet file sink connector for the faucet-stream ecosystem318MIT OR Apache-2.0
beetry-editor-typesInternal beetry crate. For the public API, check the beetry crate.318MIT
data-procA data processing pipeline framework with Source, Transformer, and Sink traits317MIT
ansiq-coreCore reactive primitives, element contracts, styles, and shared runtime-facing types for Ansiq.317MIT
faucet-sink-mssqlMicrosoft SQL Server sink connector for the faucet-stream ecosystem317MIT OR Apache-2.0
runtara-coreCore execution engine for runtara - manages instances, checkpoints, signals, and durable sleep317AGPL-3.0-or-later
runkon-flowPortable workflow execution engine — DSL, traits, and in-memory reference implementations316MIT OR Apache-2.0
eventshop-messaging-coreCore contracts (EventBus, callbacks, DTOs) for EventShop messaging.316MIT
atomholdThread-safe configuration store with atomic replacement, versioning, and flexible unload policies.316MIT
faucet-sink-elasticsearchElasticsearch sink connector for the faucet-stream ecosystem316MIT OR Apache-2.0
kithara-streamStreaming source-to-bytes layer with sync Read+Seek for audio playback.316MIT OR Apache-2.0
vvva_coreCore async primitives and runtime utilities shared across the 3va JavaScript runtime crates315MIT OR Apache-2.0
dsplce-co-throbberousThis is a fork of https://crates.io/crates/throbberous, go to the original repository if you want to use as a dep315MIT OR Apache-2.0
beetry-channelBeetry library with reusable channel implementations.315MIT
faucet-sink-kafkaApache Kafka producer sink for the faucet-stream ecosystem315MIT OR Apache-2.0
faucet-authShared, single-flight authentication providers (OAuth2, token-endpoint) for faucet-stream connectors315MIT OR Apache-2.0
vimgramA blazing fast, Vim-native Telegram client for the terminal. Built with Rust, Ratatui, and Grammers.314MIT
wesichain-checkpoint-sqlShared SQL checkpoint schema and operations314Apache-2.0 OR MIT
faucet-source-s3AWS S3 source connector for the faucet-stream ecosystem314MIT OR Apache-2.0
argentor-complianceGDPR, ISO 27001, ISO 42001, and DPGA compliance modules for Argentor314AGPL-3.0-only
miniqttA MQTTv5 only client for embedded313MIT
cruxx-coreCore types, traits, and runtime for the cruxx agentic DSL313MIT
aion-clientRust caller SDK for connecting to aion-server and operating Aion workflows.311AGPL-3.0-only
djogiModel-first web framework for Rust — web-framework-agnostic core; Axum integration opt-in via the `axum` feature flag311Apache-2.0
synwire-storageConfigurable persistent storage layout, project identity, and migration for Synwire311MIT OR Apache-2.0
datum-mqNative Kafka sources and sinks for Datum streams311Apache-2.0
plansolveOfficial Rust client library for the PlanSolve optimization API.310Apache-2.0
faucet-source-mongodbMongoDB source connector for the faucet-stream ecosystem310MIT OR Apache-2.0
mcp-kitErgonomic, type-safe Rust library for building MCP servers with plugin system and real API integrations310MIT
faucet-source-postgres-cdcPostgreSQL logical replication (CDC) source for the faucet-stream ecosystem310MIT OR Apache-2.0
shipper-retryRetry strategies and backoff policies for shipper310MIT OR Apache-2.0
vcs-watchWatch a Git or Jujutsu repository and stream typed state-change events (branch, HEAD, dirty, conflicts) — async, built on…310MIT
rusty-geniusPublic facade for rusty-genius309MIT
oxihttp-clientOxiHTTP HTTP client implementation.309Apache-2.0
ai-agents-factsKey facts extraction and actor memory for AI Agents framework309Apache-2.0
rakhas_loggerAsync logging library with batch processing and graceful shutdown308MIT OR Apache-2.0
wuhu-coreCore traits and types for the Wuhu agent framework.308MIT OR Apache-2.0
determinishticBlend deterministic Rust code with LLM-powered reasoning308MIT OR Apache-2.0
celers-broker-redisRedis broker implementation for CeleRS with Lua scripts and priority queues308Apache-2.0
easy-async-opencl3A declarative, multi-device asynchronous executor for OpenCL based on cl3.308MIT OR Apache-2.0
faucet-source-websocketWebSocket streaming source connector for the faucet-stream ecosystem308MIT OR Apache-2.0
faucet-source-mysqlMySQL query source connector for the faucet-stream ecosystem308MIT OR Apache-2.0
capnweb-clientHigh-performance Rust client for Cap'n Web RPC protocol with batching and pipelining307MIT OR Apache-2.0
zoey-coreZoeyAI core runtime and types — privacy-first AI agent framework optimized for local models307MIT
event_publisherAgnostic event publisher for outbox pattern307GPL-3.0
sigtermSignal-aware async control and cancellation primitives for Tokio.307MIT
stratneo-nautilus-backtestCore backtesting machinery for the Nautilus trading engine307LGPL-3.0-or-later
ff-serverFlowFabric server library and HTTP binary307Apache-2.0
clark-agentTyped agent loop with typed messages, typed events, swappable LLM transport, and plugin hooks. Provider-agnostic,…306Apache-2.0
faucet-source-sqliteSQLite query source connector for the faucet-stream ecosystem306MIT OR Apache-2.0
ocpncord-backendno_std Backend trait and event types for ocpncord clients.305AGPL-3.0-only
fcdb-concurConcurrency primitives and async utilities for FCDB305Apache-2.0
rs_eventsA flexible and ergonomic event emission crate for Rust. Supports both std/threaded and no_std/alloc environments, with tagging,…305MIT OR Apache-2.0
behest-contextLayered context system for the behest agent runtime305MIT OR Apache-2.0
faucet-source-csvCSV file source connector for the faucet-stream ecosystem305MIT OR Apache-2.0
paigasus-helikon-macrosProc macros for the Paigasus Helikon AI SDK.305Apache-2.0 OR MIT
hiver-runtimeHigh-performance async runtime for Hiver Framework.
Hiver框架的高性能异步运行时。
Equivalent to: Spring WebFlux Reactor, Project Reactor305MIT OR Apache-2.0
acktor-ipcInterprocess communication support for the acktor actor framework305MIT
zus-rpc-clientRPC client library for ZUS framework with load balancing and health checks304MIT OR Apache-2.0
zus-rpc-serverRPC server library for ZUS framework with async handlers304MIT OR Apache-2.0
llm-stack-anthropicAnthropic Claude provider for the llm-stack SDK304Apache-2.0
liveA modular configuration framework with live reloading and atomic, format-agnostic updates.304MIT
faucet-source-webhookWebhook receiver source connector for the faucet-stream ecosystem304MIT OR Apache-2.0
hexeract-outbox-postgresPostgreSQL backend for the Hexeract outbox via deadpool_postgres303MIT OR Apache-2.0
llm-stack-openaiOpenAI GPT provider for the llm-stack SDK303Apache-2.0
skg-state-memoryIn-memory StateStore implementation for skelegent303MIT OR Apache-2.0
claude-agents-sdkRust SDK for building agents with Claude Code CLI303MIT
faucet-source-parquetApache Parquet file source connector for the faucet-stream ecosystem303MIT OR Apache-2.0
llm-stack-ollamaOllama local model provider for the llm-stack SDK303Apache-2.0
tirea-extension-handoffAgent handoff extension: same-thread agent switching with dynamic overlay for tirea agents303MIT OR Apache-2.0
ra4m1-ctpacPeripheral Access Crate (PAC) for the Renesas RA4M1.303LGPL-3.0-or-later
murgamu-macrosProcedural macros for Murgamü303LGPL-3.0-or-later
udxRust port of libudx, a protocol for reliable, multiplex, and congestion controlled streams over udp302MIT OR Apache-2.0
hocuspocus-rs-wsAsync WebSocket server implementing the Hocuspocus collaborative editing protocol in Rust.302MIT
tendrilsTiny, flexible helpers for managing shared state (Arc<Mutex<T>> / Arc<RwLock<T>>) safely in async Rust.302MIT
faucet-source-snowflakeSnowflake query source connector for the faucet-stream ecosystem302MIT OR Apache-2.0
faucet-sink-jsonlJSON Lines file sink connector for the faucet-stream ecosystem302MIT OR Apache-2.0
philiprehberger-retry-kitAsync retry with exponential backoff and circuit breaker for Rust301MIT
bifrostlink-portsTransports for bifrostlink301MIT
rexis-ragRexis RAG - High-performance Retrieval-Augmented Generation framework with memory-first agents, vector search, and LLM integration301MIT
faucet-sink-snowflakeSnowflake sink connector for the faucet-stream ecosystem301MIT OR Apache-2.0
faucet-sink-bigqueryBigQuery sink connector for the faucet-stream ecosystem301MIT OR Apache-2.0
tronz-providerTRON domain model, gRPC transport, and provider for the tronz SDK.301MIT OR Apache-2.0
potassiumA lean and mean job scheduler300MIT
comnoqQUIC for compio with noq backend300MIT
axocoatl-llm-ollamaOllama/LM Studio provider for Axocoatl (OpenAI-compatible API)300Apache-2.0
faucet-source-bigqueryBigQuery query source connector for the faucet-stream ecosystem300MIT OR Apache-2.0
d-engine-clientClient library for interacting with d-engine Raft clusters via gRPC300MIT OR Apache-2.0
rusty-genius-cordSpinalCord: Message forwarding layer for rusty-genius299MIT
pivx-throttled-jsonrpcMacro-based throttled JSON-RPC client with rate limiting and batching support299MIT
myelinDefine async service APIs as traits, communicate over channels. Transport and serialization are pluggable.299Apache-2.0 OR MIT
entelix-runnableentelix composition contract — Runnable<I, O> trait, LCEL pipe, Sequence/Parallel/Router/Lambda298MIT
daimon-plugin-pgvectorpgvector-backed VectorStore plugin for the Daimon AI agent framework298MIT OR Apache-2.0
copy-channelsA collection of cross-thread channels for copyable types297MIT
wecom-aibot-rust-sdk企业微信智能机器人 Rust SDK —— 基于 WebSocket 长连接通道,提供消息收发、流式回复、模板卡片、事件回调、文件下载解密等核心能力297MIT
axocoatl-llm-anthropicAnthropic Claude provider for Axocoatl LLM abstraction297Apache-2.0
axocoatl-llm-openaiOpenAI provider implementation for Axocoatl LLM abstraction297Apache-2.0
camberOpinionated async Rust for IO-bound services on top of Tokio297MIT OR Apache-2.0
tracing-cfgSimple configuration for your tracing needs296MIT OR Apache-2.0
zero-trust-sdkRust SDK for Zero Trust Blockchain Database - Secure, programmable access to zero-trust data storage296MIT
celers-workerTask execution runtime for CeleRS with concurrency control and health checks296Apache-2.0
kcp2-coreKCP protocol core implementation — no_std compatible, zero-dependency network layer296MIT
clawft-servicesServices for clawft (cron, heartbeat, MCP)296MIT OR Apache-2.0
otherone-aiAI 提供商抽象层 — 统一的 AI 模型调用接口,支持 OpenAI、Anthropic、Fetch296MIT
atomr-agents-tts-runtime-openaiOpenAI TTS backend (tts-1, tts-1-hd, gpt-4o-mini-tts) for atomr-agents text-to-speech.296Apache-2.0
lark-channelLark/Feishu Channel SDK for Rust295MIT
tower-timelimiterAdvanced timeout handling for Tower services295MIT OR Apache-2.0
anyspawn_azureAzure SDK async runtime and process executor backed by an anyspawn spawner and a tick clock.295MIT
rig-resourcesReusable skills, tools, behavior patterns, and resource adapters for rig-compose agents.295MIT OR Apache-2.0