01sense
Observe
Agents poll chain state, APIs, and event streams. Triggers fire on schedule or when conditions match.
Framework / Base / x402
The leverage
point for
autonomous agents
Fulcrum runs agents that observe, reason, act, and settle payments on their own. Ship once, let the loop run.
180+
skills
<2s
x402 settle
24/7
self-healing
- 180+
- skills
- <2s
- x402 settle
- 24/7
- self-healing
chaineye.queryneedle.embedwordforge.chatstormglass.forecastx402.settleself-healingbudget.capagent.meshchaineye.queryneedle.embedwordforge.chatstormglass.forecastx402.settleself-healingbudget.capagent.mesh
SDK
Define once,
run forever
Attach skills from Bazaar or your own endpoints. Set a daily cap. Fulcrum meters every x402 call and restarts the agent if it crashes.
- 01TypeScript and Python SDKs
- 02Built-in x402 fetch wrapper
- 03Persistent agent state
treasury-guard.ts
import { Fulcrum, skill, wallet } from '@fulcrum/sdk';
const agent = new Fulcrum({
name: 'treasury-guard',
wallet: wallet.base({ key: process.env.AGENT_KEY }),
budget: { daily: '50', token: 'USDC' },
});
agent.use(skill('chaineye.query'));
agent.use(skill('needle.embed'));
agent.task('Rebalance when drift exceeds 2%', {
schedule: '0 */6 * * *',
onFailure: 'retry(3)',
});
await agent.start();Runtime loglive
[observe] portfolio drift: 2.4%
[reason] estimated cost: $0.03 USDC
[act] chaineye.query → ok
[act] needle.embed × 12 → ok
[settle] x402 batch: $0.031 USDC on Base
[done] next run in 6hRuntime
Four beats,
one loop
Every Fulcrum agent runs the same cycle. You define the task and budget. The framework handles recovery, metering, and settlement.
02plan
Reason
The runtime picks skills, estimates cost, and checks budget caps before any outbound call is made.
03act
Execute
Skills run in sequence or parallel. Failed steps retry with backoff. State persists across restarts.
04pay
Settle
x402 payments settle in USDC on Base. Every tool call is metered, logged, and reconciled automatically.
Skills
Compose from
the Bazaar
Skills are x402-backed capabilities. Import by name, Fulcrum handles discovery, auth, and per-call settlement.
one line to attach
agent.use(skill('stormglass.forecast'));chain
chaineye.query
$0.01
vectors
needle.embed
$0.001
llm
wordforge.chat
$0.02
data
stormglass.forecast
$0.05
web
silktongue.scrape
$0.10
image
palette.generate
$0.25
payments
paygate.verify
$0.001
private
custom.endpoint
metered
Platform
Built for production
agents
Not a chat wrapper. A runtime that keeps agents alive, solvent, and accountable.
Self-healing runtime
Agents restart on crash, replay pending steps, and backoff on rate limits. No babysitting required.
core capability
Spending caps
Daily and per-task USDC limits via x402 upto scheme.
Skill registry
Pull from Bazaar listings or register private endpoints.
Base wallet
Native key management with CAIP-2 routing and batch settlement.
Multi-agent mesh
Agents delegate subtasks to other agents with shared treasury rules.
Event triggers
Cron, webhooks, on-chain logs, or custom predicates.
Deploy
Ship agents
anywhere
Run on your laptop, in a container, or on a CI schedule. Wallet keys stay in env vars, never in source.
Read the quickstart →01
npm
npm install @fulcrum/sdkLocal dev and serverless functions
02
Docker
docker run fulcrum/agent-runnerLong-running agents with persistent state
03
GitHub Actions
uses: fulcrum/run-agent@v2Scheduled tasks with secret wallet injection