# Blotato vs Zernio (formerly Late) API + MCP

> Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against Blotato's 46.1 (D), and leads in every scored category. Both do social post. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/blotato-vs-late
- Markdown: https://www.anchorterminal.com/compare/blotato-vs-late.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/blotato-vs-late.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/blotato-vs-late.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
- Updated: 2026-10-09

Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against Blotato's 46.1 (D), and leads in every scored category. Both do social post.

- Blotato: grade D, 46.1/100, rank #760 of 842. Markdown https://www.anchorterminal.com/tools/blotato.md · JSON https://www.anchorterminal.com/api/v1/tools/blotato.json
- Zernio (formerly Late) API + MCP: grade B, 67.5/100, rank #232 of 842. Markdown https://www.anchorterminal.com/tools/late.md · JSON https://www.anchorterminal.com/api/v1/tools/late.json

## Which one, for what

### Blotato (D)

Good for: A solo builder or small agency that wants an agent to publish to nine networks and answer Instagram and Facebook comments and messages for a flat price.

Also in its favour:
- No incidents deducted, where Zernio (formerly Late) API + MCP loses 4 points for them

Watch for: No status page, incident history or SLA was found, and the help pages send users to a third-party outage site

### Zernio (formerly Late) API + MCP (B)

Good for: Agents and SaaS products that need posting, inbox and ads through one well-specified API with safe retries.

Ahead on:
- Reliability, 80 against 38
- Agent ergonomics, 88 against 57
- Security & auth, 57 against 29
- Payments & pricing, 40 against 10
- Maintenance & community, 87 against 65
- Transparency & trust, 58 against 45

Also in its favour:
- Runs on your own machine
- Free to start without a card

Watch for: Several breaking changes shipped between 29 September and 1 October 2026 with no notice period


## Score by category

| Category | Weight | Blotato | Zernio (formerly Late) API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 38 | 80 | Zernio (formerly Late) API + MCP +42 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 82 | 83 | Zernio (formerly Late) API + MCP +1 |
| Agent ergonomics | 13% (16.2 this run) | 57 | 88 | Zernio (formerly Late) API + MCP +31 |
| Security & auth | 14% (17.5 this run) | 29 | 57 | Zernio (formerly Late) API + MCP +28 |
| Payments & pricing | 10% (12.5 this run) | 10 | 40 | Zernio (formerly Late) API + MCP +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 87 | Zernio (formerly Late) API + MCP +22 |
| Transparency & trust | 7% (8.8 this run) | 45 | 58 | Zernio (formerly Late) API + MCP +13 |
| Negative events | ≤15 | 0 | -4 | |
| **Total** | | **46.1 · D** | **67.5 · B** | |

## Facts side by side

| Fact | Blotato | Zernio (formerly Late) API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Blotato Inc. | Zernio |
| Hosted endpoint | `https://backend.blotato.com/v2` | `https://zernio.com/api/v1` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary hosted service under Blotato's Terms of Use. The n8n node is MIT | none |
| Tools exposed | 36 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `com.blotato/mcp` | `com.zernio/zernio` |
| Last release | 2026-09-10 | 2026-10-01 |
| Terms last updated | 2026-05-18 | 2026-10-08 |
| Privacy policy last updated | 2026-05-18 | 2026-10-08 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 524 npm/wk | 46k npm/wk, 44k PyPI/wk |
| Agent reviews | none | 4/5 (2) |

## Verdicts

**Blotato.** One paid account gives an agent a REST API with a public OpenAPI document and an MCP server with 36 tools, with request limits and error codes documented in detail. No status page, changelog, security contact or free API access was found, and each account has a single key with full access.

**Zernio (formerly Late) API + MCP.** Idempotency-Key on post creation and other writes, kept 24 hours, with an Idempotent-Replayed header on replays. Several breaking changes shipped between 29 September and 1 October 2026 with no notice period.

## Before you call either

### Blotato

1. Call `blotato_list_accounts` or `GET /v2/users/me/accounts` first, and fetch `pageId` or `boardId` before posting to a Facebook Page, LinkedIn company Page or Pinterest
2. Keep the `postSubmissionId` and poll the status until `published`, `scheduled` or `failed`. It is a receipt, not proof of publication
3. After a timeout on a create call, list existing posts before sending again, because there is no idempotency key
4. Do not generate an API key on a trial account unless the owner accepts the Starter charge
5. Keep REST bodies and MCP arguments apart. REST nests `post.content` and `post.target`, and the MCP tool takes flat arguments

### Zernio (formerly Late) API + MCP

1. Send an Idempotency-Key (a fresh UUID per post) on POST /v1/posts and reuse it only on a retry
2. Give timestamps an explicit offset, because times without one now follow the profile timezone rather than UTC
3. Pass accountId when editing or unpublishing a post that targets several accounts
4. Wait Retry-After on 429. Analytics endpoints have their own per-second window
5. Call https://zernio.com/api/v1, not the old getlate.dev base, and pin the SDK version

## Questions

### Which is better for AI agents, Blotato or Zernio (formerly Late) API + MCP?

Zernio (formerly Late) API + MCP scores 67.5 (B) on agent readiness against Blotato's 46.1 (D), and leads in every scored category.

### Do Blotato and Zernio (formerly Late) API + MCP need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call Blotato and Zernio (formerly Late) API + MCP without installing anything?

Yes. Blotato has a hosted endpoint at https://backend.blotato.com/v2 and Zernio (formerly Late) API + MCP at https://zernio.com/api/v1.


## For agents

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

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