Fifty places instanode.dev fits
From terminal-resident coding agents that need cross-session memory to hackathon teams that need a backend in three curls. Each case lists the services that make it work — provision each in under a second, claim when you're ready.
I. Hackathon & education
24-hour hackathon backend
A team provisions Postgres + Mongo + S3-compatible storage anonymously, ships their demo, and lets the stack expire 24 hours after judging.
PostgresMongoDBSee how →Agent-resilience chaos lab
A research hackathon tests how agents behave when their database, cache, and message bus randomly fail mid-task.
PostgresRedisNATSSee how →Classroom-per-student sandbox
A CS professor provisions one ephemeral Postgres per student for a SQL assignment, dropped after grading.
PostgresSee how →
G. Internet-of-AI
A2A agent-card registry
A marketplace stores Agent Cards (skills, tags, pricing) and serves discovery queries to client agents.
PostgresSee how →Agent reputation log
Buyer agents leave ratings on seller agents after each tool call; reputation scores aggregate hourly.
PostgresRedisSee how →Agent-marketplace preview thumbnails
An agent marketplace stores screenshot previews of each listed agent's UI for human browsing.
See how →AP2 mandate audit trail
An agentic-commerce gateway stores signed user mandates ("buy X up to $Y") for later dispute resolution.
PostgresSee how →Cross-agent shared inbox
Two agents negotiate over a shared subject; messages persist in JetStream so neither needs to be online simultaneously.
NATSSee how →x402 micropayment ledger
An agent-payment hub records x402 micropayments between agents and reconciles balances per principal.
PostgresSee how →
E. Browser & automation agents
Accessibility-tree selector cache
A scraping agent caches a11y-tree snapshots in Redis so repeat selectors resolve in single-digit milliseconds.
RedisSee how →Browser job queue with retries
A fleet of Playwright workers pulls navigation tasks from a queue, marks them done, and retries on captcha.
NATSSee how →Browser-session cookie store
A browser agent persists login cookies and session state per target site so it doesn't re-auth on every run.
RedisSee how →Form-fill state machine
A long-running form-completion agent persists field-by-field progress so a captcha pause doesn't lose 30 minutes of work.
MongoDBSee how →Scraped product-price history
A shopping-watcher agent scrapes prices hourly and stores time-series rows for "alert me when it drops 20%".
PostgresSee how →Screenshot evidence archive
A QA agent captures before/after screenshots on every test run and stores them keyed by run-id for diff review.
See how →
C. Vertical AI apps
Adaptive-tutoring student model
A tutor agent tracks per-student concept mastery, picks the next problem, and adjusts difficulty based on response patterns.
PostgresSee how →AML transaction monitor
A finance agent ingests transaction streams, flags suspicious patterns, and persists compliance decisions with full reasoning trace.
PostgresNATSSee how →Clinical-scribe note storage
A medical scribe agent transcribes doctor-patient visits and stores structured SOAP notes per encounter with auditable history.
PostgresSee how →Contract redline cache
A contract-review agent caches clause embeddings so re-running redlines on a 200-page MSA is instant on the second pass.
PostgresRedisSee how →EHR appointment webhook fan-in
A medical-intake agent receives appointment-created webhooks from multiple EHR vendors and unifies them into one queue.
WebhookNATSSee how →Personal-injury demand letters
A legal agent drafts demand letters from case files, stores prior versions, and emits webhooks to the firm's case-management system.
PostgresWebhookSee how →
P. Agent benchmarking & evaluation
Adversarial red-team runner
A LangWatch-Scenario-style service spawns attacker agents that probe a target chatbot in parallel; transcripts persist in Mongo and successful jailbreaks fire a webhook to the security team.
MongoDBWebhookSee how →GAIA tournament bracket
A tournament service runs 16 agent variants head-to-head on GAIA tasks; pairings live in Mongo, intermediate transcripts in S3-compatible storage, win counts in Redis sorted sets for the live leaderboard.
MongoDBRedisSee how →LLM-as-judge consensus pool
Five judge agents score the same agent output in parallel; their verdicts converge in Postgres and a tiebreaker rolls in only on disagreement, all coordinated through a NATS request/reply.
PostgresNATSSee how →SWE-bench parallel rollout harness
A benchmark runner spawns 500 isolated agent instances against 500 SWE-bench-Verified tasks, each with a private Postgres scratch and its results written to S3-compatible storage for the judge model.
PostgresDeploySee how →Terminal-Bench shell sandbox grid
A grid runner deploys 100 ephemeral shell sandboxes, each running a Terminal-Bench task with its own ephemeral DB; pass/fail webhooks aggregate to a Postgres results table.
PostgresWebhookDeploySee how →Trajectory diff regression harness
On every PR to the agent repo, a CI agent re-runs 1000 cached trajectories in parallel and stores diffs against the baseline in S3-compatible storage so reviewers see exactly which behaviors changed.
PostgresSee how →
O. Cross-agent commerce & payments
Agent-marketplace escrow
A platform lets agents post jobs and other agents bid; funds sit in an escrow row in Postgres and release via webhook once a verifier agent signs off on delivery.
PostgresWebhookSee how →AP2 mandate broker
A Google-AP2-style mandate service stores a user's shopping mandate in Postgres, lets buyer agents request approval via webhook, and emits signed receipts for each purchase.
PostgresWebhookSee how →Per-agent rate-limited API key vault
A vault service mints scoped, rate-limited API keys for child agents on demand; Redis tracks per-key usage and the spend rolls up to a Postgres billing event stream.
RedisPostgresSee how →Stripe-ACP checkout agent
A shopping agent uses the Stripe + OpenAI Agentic Commerce Protocol to place an order; the merchant agent receives a webhook with the cart, persists it in Mongo, and ships.
WebhookMongoDBSee how →x402 micropayment per tool call
An agent calling another agent's premium MCP tool receives HTTP 402, settles a 0.3-cent USDC payment, and retries; the receiver tracks paid calls in Redis with a Postgres ledger.
RedisPostgresWebhookSee how →
N. Multi-agent observability
Agent-run lineage store
An evaluation team builds a lineage UI where every run links to its parent run and its eval verdict; the relation graph lives in Postgres and the raw transcripts in S3-compatible storage.
PostgresSee how →Cross-agent replay debugger
A debug agent stores full prompt+response payloads for an entire multi-agent run in S3-compatible storage, with an index in Mongo so an engineer can replay any branch deterministically.
MongoDBSee how →Live agent-topology graph
Each spawn/handoff event is published to a NATS subject; a topology agent subscribes and maintains a real-time graph of which parent spawned which child in Postgres for the dashboard.
NATSPostgresSee how →OpenTelemetry agent-trace ingest
A Langfuse-style collector receives OTel spans from 200 concurrent agents via a webhook endpoint, writes them to Postgres, and stores large prompt payloads in S3-compatible storage.
WebhookPostgresSee how →Per-agent dead-letter inspection queue
Every failed tool call from a swarm is republished to a NATS DLQ; an investigator agent pulls them in batches, classifies the failure mode, and persists clusters in Mongo for the operator UI.
NATSMongoDBSee how →Token-cost ledger per sub-agent
Every LLM call from any agent in a fleet emits a webhook with input/output tokens; a ledger agent aggregates spend per tenant in Postgres and triggers throttling at thresholds.
WebhookPostgresRedisSee how →
L. Agent-factory / spawning patterns
AgentCore tenant-scoped spawning
An AWS-AgentCore-style multi-tenant SaaS spins up one isolated agent runtime per customer org on demand, each pulling its own connection_url from the platform's vault.
PostgresRedisSee how →AI cofounder spawns a startup
A founder-agent reads a one-line idea, provisions Postgres + S3-compatible storage + a webhook + a deploy slot, generates a landing page, and hands the bundle to a marketing sub-agent.
PostgresWebhookDeploySee how →Cloudflare sub-agent factory per user
A Durable-Object-style root agent mints a fresh sub-agent for each end-user, each with its own SQL-backed memory and a deploy slot for that user's tools.
PostgresDeploySee how →Devin-style PR-bot fleet
A Cognition-Devin-style orchestrator spawns one fresh agent worker per inbound GitHub issue, each with its own scratch Postgres for running migrations against, and reports back via webhook.
PostgresWebhookDeploySee how →Per-tenant chatbot factory at signup
When a B2B SaaS user clicks 'Add AI assistant', the factory provisions a dedicated Mongo for that tenant's chat history, a Redis for session state, and deploys an isolated agent container.
MongoDBRedisDeploySee how →Smithery one-MCP-per-skill mint
A Smithery-like MCP host launches a dedicated MCP server per installed skill behind a webhook URL, each receiving tool calls and writing results to a shared Redis bus.
WebhookRedisDeploySee how →
M. Parallel tool execution
Anthropic parallel tool_use batch
A Claude turn emits 8 simultaneous tool_use blocks; an executor fans them out to 8 NATS subjects, each handler writes its result to Redis keyed by tool_use_id, and the assistant collects them for the next turn.
NATSRedisSee how →Browser-agent action pool
A Skyvern-style planner emits 20 actions (fill, click, scroll) that fan out across 20 Browserbase tabs simultaneously; results aggregate in Mongo keyed by step_id.
MongoDBNATSSee how →Multi-model bake-off router
A router agent dispatches the same prompt to GPT, Claude, and Gemini concurrently; the first valid JSON response wins, and loser turns get cached in Redis for next time.
RedisNATSSee how →Parallel SQL-plan probe
A data-analyst agent issues 12 candidate EXPLAIN ANALYZE queries against a forked Postgres in parallel, picking the lowest-cost plan to run against the real DB.
PostgresRedisSee how →Pyodide notebook cell agent farm
An analyst agent splits a 200-cell notebook across 30 Pyodide workers, each writing intermediate dataframes to S3-compatible storage so the planner can pull only the ones it needs.
NATSSee how →Speculative agent rollout race
A speculative-decoding-style orchestrator runs the same task at three temperatures in parallel; a verifier agent picks the best output and discards the rest, all coordinated via NATS request/reply.
NATSPostgresSee how →
D. Personal AI
arXiv-and-RSS research feed
A research agent receives webhook pings from arXiv and RSS bridges, dedupes via Redis, and stores PDFs for later retrieval.
WebhookRedisSee how →CRM for one person
A personal CRM agent remembers names, birthdays, and last-conversation summaries indexed per contact.
PostgresSee how →Cross-device chat history
A personal assistant stores conversation history in Mongo so the same agent picks up context on phone, laptop, and watch.
MongoDBSee how →Daily-journal episodic memory
An assistant logs each day as a structured journal entry and retrieves "what was I working on Monday?" with sub-second latency.
PostgresRedisSee how →Obsidian-vault embedding sync
A personal research agent embeds Obsidian notes nightly into pgvector and answers questions across years of writing.
PostgresSee how →Voice-memo capture pipeline
A second-brain agent receives uploaded voice memos, transcribes them, and files transcripts plus audio for semantic search.
PostgresSee how →
B. Multi-agent systems
AutoGen group-chat history
An AutoGen multi-agent chat stores per-conversation message logs in Mongo for audit and replay across days.
MongoDBSee how →CrewAI message bus fan-out
A crew of planner / retriever / critic agents publishes tasks on NATS subjects so any worker pod can pull and reply.
NATSSee how →Cross-framework A2A gateway
A gateway service translates A2A-protocol messages between a LangGraph crew and a CrewAI crew over pub/sub.
NATSPostgresSee how →Durable agent task queue
A supervisor agent enqueues sub-tasks on a durable queue; failed jobs re-emerge with exponential backoff.
NATSSee how →LangGraph state checkpoints
A LangGraph workflow checkpoints node state to Postgres so a crashed run resumes mid-graph instead of restarting from scratch.
PostgresSee how →Live agent status broadcast
Worker agents broadcast heartbeats on a status subject so a dashboard shows which agent is stuck mid-tool-call.
NATSRedisSee how →Shared episodic memory store
A planner and a researcher agent read and write the same episodic memory table so each agent sees the other's findings.
PostgresSee how →
F. Developer tooling
CI flake-tracker
A CI bot ingests test-run webhooks, fingerprints failures, and surfaces "this test is flaky 30% of runs".
WebhookPostgresSee how →Deploy-status MCP server
An MCP server tracks live deploy status across environments and pushes updates to a chat agent over pub/sub.
NATSRedisSee how →Full dev backend in one curl
An AI agent or developer provisions Postgres + Redis + MongoDB anonymously to develop against — no Docker, no cloud account, no installer — and tears it down when done.
PostgresRedisMongoDBSee how →High-volume PR-review pipeline
An automated reviewer handles thousands of MRs/day, queues each review job, and stores comment artifacts per run.
NATSSee how →On-call incident-response agent
An on-call agent listens for alert webhooks, executes a runbook, and posts the action log back into the incident ticket.
WebhookPostgresSee how →Pre-commit skill-scanner webhook
An MCP skill security scanner receives pre-commit webhooks, scans agent skills against a ruleset, and blocks the push on critical findings.
WebhookSee how →SARIF scan-result store
A security scanner posts SARIF results into Postgres so trend dashboards show drift over weeks of commits.
PostgresSee how →
J. Agent swarms & fan-out
Claude Code agent-teams scratchpad
A lead Claude Code session spawns 6 sibling worker sessions, each owning one module of a monorepo; they coordinate by reading and writing a shared scratchpad table.
PostgresRedisSee how →CrewAI parallel-process crew
A CrewAI Process.parallel run executes researcher, writer, and fact-checker agents simultaneously against a shared pgvector store, each persisting partial drafts as it works.
PostgresRedisSee how →LangGraph fan-out research agents
A planner agent splits a research question into 12 sub-queries and dispatches them to parallel LangGraph workers that each hit different sources, returning JSON to a NATS subject the reducer subscribes to.
NATSPostgresSee how →Magentic-One DAG executor
A Microsoft-Magentic-One-style orchestrator decomposes a goal into a task DAG, dispatches independent branches to parallel agents, and merges their outputs after a quality-gate agent approves each branch.
NATSPostgresSee how →OpenAI Agents SDK handoff mesh
A triage agent hands off to specialist agents (refund, shipping, fraud) running concurrently, each maintaining its own conversation thread row keyed by handoff_id.
PostgresRedisSee how →Scatter-gather price comparison swarm
A consumer agent broadcasts a product query to 40 retailer-specific shopper agents over a NATS subject; the first 5 cheapest replies win and the rest are cancelled mid-flight.
NATSRedisSee how →
A. AI coding agents
Coding-agent cross-session memory
A terminal-resident coding agent persists architectural decisions across days so it can recall "what we tried Tuesday" via pgvector similarity search.
PostgresSee how →Conversation transcript archive
Coding sessions are persisted as JSONL transcripts for replay, fine-tuning, and "what did we try last sprint" search across the team.
See how →Ephemeral test database for a risky migration
A coding agent provisions a throwaway Postgres in under a second, dry-runs a destructive migration, inspects the result, then discards the database — no production blast radius.
PostgresSee how →Multi-repo shared scratchpad
Multiple agents working across separate repos coordinate via a shared scratchpad document store keyed by feature branch.
MongoDBSee how →PR-review bot triggered by webhooks
A code-review agent receives PR webhooks from GitHub, posts inline comments, and re-reviews on each push while caching diffs between runs.
WebhookRedisSee how →Repo-wide code dependency graph
An agent indexes a polyrepo into a blast-radius graph so it can answer "what breaks if I rename this function" before editing.
PostgresSee how →Sandboxed test runner per task
A coding agent spins up a throwaway container per task to run the user's test suite in isolation, tears it down on success or failure.
DeploySee how →Tool-call rate-limit and budget cache
A coding agent caches LLM token budgets and rate-limit windows in Redis so parallel sub-agents don't burn quota fighting each other.
RedisSee how →
K. Ephemeral agent runtimes
Copy-on-write Postgres for agent migrations
An Ardent-style coding agent forks a 6-second copy-on-write clone of prod Postgres, runs the candidate ALTER TABLE, validates row counts, then destroys the clone.
PostgresSee how →Cursor background-agent worktree
A Cursor background agent claims an isolated dev environment for each branch it's working on, with its own Redis for build caches and a webhook to ping the IDE when the PR is ready.
RedisWebhookDeploySee how →Daytona warm-pool data workspace
A Daytona warm pool of 50 Python sandboxes each pre-attaches to a per-sandbox Redis namespace for caching pip-resolver results, so cold start to first agent action is under 100ms.
RedisDeploySee how →E2B microVM sandbox per agent turn
Each turn of a code-writing agent spins up a fresh E2B-style microVM whose scratch Postgres connection_url lives only for the lifetime of the sandbox, then is reaped.
PostgresDeploySee how →Replit-Agent preview backend
A Replit-Agent-style preview deploys a one-shot app with a 24h-TTL Postgres so a reviewer can poke at the prototype, then everything is collected when the share link expires.
PostgresDeploySee how →Sandbox-per-PR preview deployment
A reviewer agent provisions a throwaway storage bucket plus Postgres tied to a PR number, seeds it from a snapshot, and the whole thing is torn down when the PR closes.
PostgresDeploySee how →
Q. Background/async agent fleets
Cron-scheduled scraping swarm
A scheduler fans out 5000 cron-triggered scraper agents per hour; each writes its diff to Mongo and pings a webhook only when the page changed.
MongoDBWebhookSee how →Inbox-zero agent fleet
A Cloudflare-Email-style fleet runs one durable agent per user that triages incoming email, files attachments in S3-compatible storage, and stores extracted action items in Postgres.
PostgresWebhookSee how →Long-horizon Temporal agent workflow
A Temporal-backed agent runs a 14-day procurement negotiation across vendors; each step persists in Postgres with NATS signals so a human can interject without breaking the workflow.
PostgresNATSSee how →Overnight dossier fleet
An async research service queues hundreds of overnight dossier jobs; workers persist intermediate findings in Mongo and PDF outputs in S3-compatible storage when complete.
MongoDBSee how →Restate-style durable sidecar
A Restate sidecar intercepts agent HTTP tool calls and journals them to Postgres so any crash mid-run resumes deterministically without re-charging external APIs.
PostgresSee how →Slack/Discord async bot factory
A factory spins up one durable agent per Slack workspace that subscribes to events via webhook, batches them, and runs nightly summarizer jobs persisting digests in Postgres.
WebhookPostgresSee how →
R. Edge agents & federated swarms
Federated-learning aggregator
Edge agents on user devices compute private gradients and POST them to an aggregator webhook; the aggregator stores rounds in S3-compatible storage and the new global weights in Postgres.
WebhookPostgresSee how →Geo-sharded chat-agent fleet
Region-pinned agents in EU, US, and APAC each own a local Redis for session state, replicating only consented memories to a central Postgres for cross-region handoff.
RedisPostgresSee how →Per-device edge-agent state sync
An IoT fleet of 10,000 edge agents each runs on a Workers-style runtime, syncing local SQLite deltas to a central Postgres via webhook batches every minute.
WebhookPostgresSee how →
H. Indie & SaaS founders
One-afternoon MVP backend
A solo founder spins up Postgres + Redis from a curl call in their Claude Code session and ships a paid product by evening.
PostgresRedisDeploySee how →Pre-launch waitlist store
A landing page captures emails via a webhook receiver and stores them with UTM context for nurture campaigns.
WebhookPostgresSee how →Side-project container deploy
An indie hacker ships a Dockerized app to a subdomain with one HTTP call — no DevOps account, no Helm chart, no IaC.
DeploySee how →Solo-founder analytics warehouse
A founder pipes product events into Postgres and runs SQL queries via an MCP-Postgres tool from chat.
PostgresSee how →Stripe-event entitlements
A SaaS receives Stripe webhooks, updates user plan tier, and invalidates a Redis entitlement cache atomically.
WebhookRedisPostgresSee how →