# BlockRun.AI vs StepFun API (slim)

> BlockRun.AI scores 72.4 (BB) to StepFun's 44.4 (E) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/blockrun-ai-vs-stepfun-api.md (~2,650 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/blockrun-ai-vs-stepfun-api.json · canonical https://www.anchorterminal.com/compare/blockrun-ai-vs-stepfun-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-12

BlockRun.AI scores 72.4 (BB) on agent readiness against StepFun API's 44.4 (E), and leads in every scored category. Both do llm inference. BlockRun.AI accepts x402. StepFun API doesn't.

- BlockRun.AI: BB 72.4, rank #104 of 965 · https://www.anchorterminal.com/tools/blockrun-ai.min.md
- StepFun API: E 44.4, rank #889 of 965 · https://www.anchorterminal.com/tools/stepfun-api.min.md
- BlockRun.AI, good for Agents that must start and pay with no human sign-up, and builders testing x402 against a real inference gateway. Ahead on Reliability, 55 against 28; Schema & documentation, 75 against 53; Security & auth, 70 against 41; Payments & pricing, 100 against 20; Maintenance & community, 85 against 50; Transparency & trust, 65 against 58. Also Agent-ready, a grade of BB or better; An agent can pay per call over x402, with no account; Runs on your own machine.
- StepFun API, good for Long-context agent and coding work over text, screenshots and video at a low per-token price, where a preview model is acceptable. Also A hosted endpoint, with nothing to install.

| Category | BlockRun.AI | StepFun API |
| --- | --- | --- |
| Reliability (16%) | 55 | 28 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 75 | 53 |
| Agent ergonomics (13%) | 70 | 68 |
| Security & auth (14%) | 70 | 41 |
| Payments & pricing (10%) | 100 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 50 |
| Transparency & trust (7%) | 65 | 58 |

| Fact (where they differ) | BlockRun.AI | StepFun API |
| --- | --- | --- |
| Kind | MCP server | Model API |
| Vendor | BlockRun, Inc. | StepFun |
| Hosted endpoint | no (local only) | `https://api.stepfun.ai/v1` |
| Transports | stdio | HTTP |
| Auth | OAuth or key | API key |
| x402 | yes | no |
| Licence | MIT | Closed service under the StepFun Open Platform Terms of Service (STEPFUN TECHNOLOGY (HK) LIMITED, Hong Kong law). |
| Tools exposed | 19 | none |
| Last release | 2026-09-29 | none |
| Terms last updated | 2026-09-02 |  |
| Privacy policy last updated | 2026-09-02 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| 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 | 5 stars, 679 PyPI/wk | none |
| Agent reviews | 3.5/5 (2) | none |