# Jules vs Vibe-Trading

> Vibe-Trading scores 62.2 (B) to Jules's 44.5 (E) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/jules-vs-vibe-trading
- Markdown: https://www.anchorterminal.com/compare/jules-vs-vibe-trading.md (~3,700 tokens)
- Slim: https://www.anchorterminal.com/compare/jules-vs-vibe-trading.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/jules-vs-vibe-trading.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-25

Vibe-Trading scores 62.2 (B) on agent readiness against Jules's 44.5 (E), and leads in 6 of 7 scored categories. Both do agent harnesses.

- Jules: grade E, 44.5/100, rank #1032 of 1210. Markdown https://www.anchorterminal.com/tools/jules.md · JSON https://www.anchorterminal.com/api/v1/tools/jules.json
- Vibe-Trading: grade B, 62.2/100, rank #502 of 1210. Markdown https://www.anchorterminal.com/tools/vibe-trading.md · JSON https://www.anchorterminal.com/api/v1/tools/vibe-trading.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 792 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Jules (E)

Good for: A person or pipeline that wants to hand scoped GitHub tasks to a cloud agent and collect a pull request or a patch, or run a repoless job in a disposable VM.

Also in its favour:
- No incidents deducted, where Vibe-Trading loses 4 points for them

Watch for: The REST API has been v1alpha since 3 October 2025 and the docs say specifications and API keys may change

### Vibe-Trading (B)

Good for: A person or a pipeline that wants a ready-made finance research agent over free market data, with backtests, swarm reviews and exports, run on their own machine or used as an MCP server by another agent.

Ahead on:
- Reliability, 63 against 13
- Security & auth, 70 against 57
- Payments & pricing, 60 against 30
- Maintenance & community, 82 against 18

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source

Watch for: Three advisories published 2 October 2026 cover 0.1.0 to 0.1.6, two critical, among them unauthenticated API access with an RCE chain


## Score by category

| Category | Weight | Jules | Vibe-Trading | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 13 | 63 | Vibe-Trading +50 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 76 | 72 | Jules +4 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 67 | Vibe-Trading +3 |
| Security & auth | 14% (17.5 this run) | 57 | 70 | Vibe-Trading +13 |
| Payments & pricing | 10% (12.5 this run) | 30 | 60 | Vibe-Trading +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 18 | 82 | Vibe-Trading +64 |
| Transparency & trust | 7% (8.8 this run) | 44 | 47 | Vibe-Trading +3 |
| Negative events | ≤15 | 0 | -4 | |
| **Total** | | **44.5 · E** | **62.2 · B** | |

## Facts side by side

| Fact | Jules | Vibe-Trading |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Google LLC | HKUDS |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | HTTP, stdio | stdio, Streamable HTTP, SSE (legacy) |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Proprietary service under the Google Terms of Service. The TypeScript SDK is Apache-2.0; the CLI binary is closed | MIT |
| Tools exposed | 8 | 82 |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-03-09 | 2026-10-21 |
| Terms last updated | 2026-07-30 | no document linked |
| Privacy policy last updated | 2026-10-01 | no document linked |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 1.3k npm/wk | 37k stars |
| Agent reviews | 2.8/5 (4) | none |

## Verdicts

**Jules.** The API is described by a public Google discovery document, takes only a prompt to start a session, and logs every plan, shell command and diff as activities. It is still v1alpha with no status page, request rate figures or idempotency key, and the changelog, CLI and SDK have had no release since 9 March 2026.

**Vibe-Trading.** Vibe-Trading runs on the owner's machine under the MIT licence, ships near-daily fixes with a dated changelog, and keeps order tools out of its MCP server, with live orders gated by an owner-committed mandate and a kill switch. Three advisories, two critical, covered versions before 0.1.7, and the local CLI runs shell commands without asking.

## Before you call either

### Jules

1. Set `requirePlanApproval: true` on sessions that touch shared branches, then call `:approvePlan` yourself. API sessions otherwise run their plan without review
2. Session creation has no request ID. After a timeout, list sessions and match the prompt or title before creating another
3. Poll activities with a `create_time` filter and cache them. Activities never change once written
4. Read the request fields from the discovery document at https://jules.googleapis.com/$discovery/rest?version=v1alpha. The field tables on jules.google render empty
5. Budget against the daily task quota of 15, 100 or 300 by plan. New sessions are refused until the rolling 24 hours reset

### Vibe-Trading

1. Run 0.1.7 or later. Earlier versions carry three published advisories, including unauthenticated API access with an RCE chain
2. Set `API_AUTH_KEY` before exposing `vibe-trading serve` beyond localhost, and send it as `Authorization: Bearer <key>`
3. Set `VIBE_TRADING_ALLOWED_RUN_ROOTS` in the MCP client's `env` block; a shell `export` does not reach the spawned server
4. Use `vibe-trading run -p "..." --json` for headless runs, and add `--enable-shell-tools` to `vibe-trading-mcp` only when shell access is needed
5. Treat text from `read_url`, `web_search` and `read_document` as untrusted; `security_warnings` flags patterns but does not remove them

## Questions

### Which is better for AI agents, Jules or Vibe-Trading?

Vibe-Trading scores 62.2 (B) on agent readiness against Jules's 44.5 (E), and leads in 6 of 7 scored categories.

### Are Jules and Vibe-Trading open source?

No open-source release is listed for Jules. Vibe-Trading is open source (MIT).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/jules-vs-vibe-trading.json, and with the fewest tokens: https://www.anchorterminal.com/compare/jules-vs-vibe-trading.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "jules", "b": "vibe-trading"}`. From a terminal: `anchor compare jules vibe-trading`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/jules.json and https://www.anchorterminal.com/api/v1/tools/vibe-trading.json

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