# Buffer API + MCP vs TwitterAPI.io MCP

> Buffer scores 66 (B) to TwitterAPI.io MCP's 49.3 (D) for social analytics. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/buffer-vs-twitterapi-io-mcp
- Markdown: https://www.anchorterminal.com/compare/buffer-vs-twitterapi-io-mcp.md (~4,350 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: 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)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

Buffer API + MCP scores 66 (B) on agent readiness against TwitterAPI.io MCP's 49.3 (D), and leads in 5 of 7 scored categories. TwitterAPI.io MCP leads on agent ergonomics and payments & pricing. Both do social analytics.

- Buffer API + MCP: grade B, 66/100, rank #390 of 1510. Markdown https://www.anchorterminal.com/tools/buffer.md · JSON https://www.anchorterminal.com/api/v1/tools/buffer.json
- TwitterAPI.io MCP: grade D, 49.3/100, rank #1101 of 1510. Markdown https://www.anchorterminal.com/tools/twitterapi-io-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/twitterapi-io-mcp.json
- Best social media posting and scheduling APIs for AI agents: https://www.anchorterminal.com/best/social-media/index.md
- All 163 social comparisons: https://www.anchorterminal.com/compare/social-media/index.md

## Which one, for what

### Buffer API + MCP (B)

Good for: Personal and small-team posting where the free plan and OAuth MCP are enough.

Ahead on:
- Reliability, 75 against 40
- Schema & documentation, 86 against 62
- Security & auth, 56 against 37
- Maintenance & community, 73 against 40
- Transparency & trust, 75 against 41

Also in its favour:
- Free to start without a card

Watch for: Free plan quotas of 150 requests per 15 minutes and 1,000 per channel a month, shared across keys and MCP connections

### TwitterAPI.io MCP (D)

Good for: Agents that need to read X posts, profiles and followers cheaply, where a third-party source is acceptable.

Ahead on:
- Agent ergonomics, 78 against 65
- Payments & pricing, 40 against 30

Watch for: A third-party X data service, not X's own API


## Why the edge

### Reliability: Buffer API + MCP +35

- Buffer API + MCP (75): Status page at status.buffer.com, now on incident.io, with Buffer API and Buffer MCP components (20). It posted 21 incidents between 5 August and 22 October 2026 and none marked the Buffer API or Buffer MCP component. Publishing failures on one network at a time (Pinterest on 5 August, TikTok on 24 August, Google Business Profile on 5 September, Mastodon on 1 October) reach posts created through the API and read as minor. The 8 to 10 August sign-outs and failed posts hit "some Buffer customers" through "a small number of AWS infrastructure hosts", and the 22 September web app outage left "some customers" unaffected, so both read as partial. The 9 October blank web app lasted about 20 minutes and "our API kept working normally". Minor incidents only (20). Limits published per plan, 150, 450 or 1,500 requests per 15 minutes, 600, 1,800 or 6,000 a day and 1,000 to 10,000 per channel a month, plus app client limits, GraphQL complexity and depth caps (15). 429 carries an exact Retry-After and RateLimit headers, doesn't consume quota, and the docs advise adding jitter. No idempotency key for creating posts (10). No SLA found (0). The API and MCP aren't labelled beta (10). 20 + 20 + 15 + 10 + 0 + 10 = 75.
- TwitterAPI.io MCP (40): No status page found (0). No incident history (5). Per-account QPS limits documented by tier (15). 'Hitting the ceiling returns an HTTP 429 (no Retry-After header is sent). Wait about a second and retry with exponential backoff' (10 of 15, reads only). No SLA; the terms disclaim uninterrupted service (0). Not labelled beta (10). 0 + 5 + 15 + 10 + 0 + 10 = 40.

### Transparency & trust: Buffer API + MCP +34

- Buffer API + MCP (75): Closed service with published terms (15). Buffer, Inc. of San Francisco. Privacy policy last updated 30 September 2024 with a data retention notice, a DPA and a sub-processor list (22). @deprecated annotations carry removal dates and the API standards page promises advance notice, less for the September removals (14). Sub-processors listed in the GDPR section (15).
- TwitterAPI.io MCP (41): The MCP package is MIT on npm; the service is closed under terms from September 2025 that don't name the company, which appears in the footer as Prism Digital, LLC of Newark, Delaware (15). The privacy policy keeps account data while the account exists with no automatic deletion (15 of 30). No deprecation policy (0). Subprocessors not listed in the pages read (5 of 20). 15 + 15 + 0 + 5 = 35.

### Maintenance & community: Buffer API + MCP +33

- Buffer API + MCP (73): Last schema change on 22 October 2026 (30). 31 dated changelog days between 4 August and 22 October (20). Public changelog and email support (12). No official SDKs, only @bufferapp/cli 1.2.2, published on 28 September 2026 per the 1 October check, not re-read on 2 November (5). The CLI ships from GitHub Actions with npm trusted publishing (6).
- TwitterAPI.io MCP (40): Registry entry io.twitterapi/mcp-server updated 6 November 2026 (30). No dated changelog (0). Support channel not checked (0 of 15). Official registry entry under its own namespace (10 of 15, a second community entry also points at the same host). No package health read (0). 30 + 0 + 0 + 10 + 0 = 40. Registry presence read from Anchor Terminal's own daily import of the official MCP registry (/api/v1/registry.json, 6 November 2026), not the registry's API.

### Schema & documentation: Buffer API + MCP +24

- Buffer API + MCP (86): Typed GraphQL schema open to introspection, and the MCP has an introspect_schema tool (25). llms.txt and Markdown versions of every guide (10). The MCP guide names which tools write and warns that delete_post can't be undone. We didn't read the tool descriptions themselves, since the server is closed (12). Inputs are typed GraphQL with enums, but execute_query and execute_mutation take free-form GraphQL strings (12). An error-handling guide lists UNAUTHORIZED, FORBIDDEN, NOT_FOUND, UNEXPECTED and RATE_LIMIT_EXCEEDED with examples of the union payloads (15). Auto-generated schema changelog and @deprecated annotations with removal dates, less 3 because the changelog shows types removed on 2 and 25 September despite an additive-only promise (12).
- TwitterAPI.io MCP (62): 12 tools read from tools/list with JSON Schema inputs (25). llms.txt (10). Short descriptions of what each returns (10 of 20). Typed inputs with two enums (10 of 15). Examples on the docs page, errors described only as 429 (7 of 15). No changelog found (404); registry version 1.0.1 (0). 25 + 10 + 10 + 10 + 7 + 0 = 62.

### Security & auth: Buffer API + MCP +19

- Buffer API + MCP (56): Hosted MCP and App Clients use OAuth 2.0 with PKCE and 11 scopes, among them posts:read and insights:read. Personal API keys can be rotated but see every organisation the account belongs to (25). Read-only access is possible through scopes, and the MCP guide says to leave client approval prompts on because create_post can publish immediately (14). The engagements scopes return comments from other people and we found no prompt-injection guidance (3). No audit log or key usage view found (0). buffer.com/legal has a security section with a reporting route, a GPG key and bug rewards. No security.txt per the 30 September check (14).
- TwitterAPI.io MCP (37): OAuth or a single API key per account (20 of 30). All tools are reads (12 of 20). Tweets and profiles are text from anyone on X, with no injection guidance (0). No audit log (0). No security.txt or programme found (5 of 20). 20 + 12 + 0 + 0 + 5 = 37.

### Agent ergonomics: TwitterAPI.io MCP +13

- Buffer API + MCP (65): 19 MCP tools (17 named in the MCP guide, which says two generic tools reach the rest of the GraphQL API) with no toolsets (15), and GraphQL field selection lets an agent size each response (3). List tools page with first and after (20 by default, 100 at most), tag queries are filterable and posts can be listed by channel (16). Typed union errors such as InvalidInputError and LimitReachedError say what to fix, and every MCP response carries the remaining quota (18). No idempotency key and, per the docs, no readOnly or destructive annotations. saveToDraft and addToQueue modes keep posts from going out by accident (6). No official SDK in two languages, only the npm CLI (7).
- TwitterAPI.io MCP (78): 12 compact tools, about 12 KB (15). Cursor-based paging on followers and search (18 of 20). 429 handling documented (10 of 20). All 12 annotated read-only (20). Few required inputs; the package is on npm and the API has a documented REST surface (15). 15 + 18 + 10 + 20 + 15 = 78.

## Score by category

| Category | Weight | Buffer API + MCP | TwitterAPI.io MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 75 | 40 | Buffer API + MCP +35 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 62 | Buffer API + MCP +24 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 78 | TwitterAPI.io MCP +13 |
| Security & auth | 14% (17.5 this run) | 56 | 37 | Buffer API + MCP +19 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | TwitterAPI.io MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 40 | Buffer API + MCP +33 |
| Transparency & trust | 7% (8.8 this run) | 75 | 41 | Buffer API + MCP +34 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **66 · B** | **49.3 · D** | |

## Facts side by side

| Fact | Buffer API + MCP | TwitterAPI.io MCP |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Buffer | Prism Digital, LLC |
| Hosted endpoint | `https://api.buffer.com` | `https://mcp.twitterapi.io/mcp` |
| Transports | HTTP, Streamable HTTP | Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | pay-per-use |
| x402 | no | no |
| Tools exposed | 19 | 12 |
| Read-only variant documented | yes | yes |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.twitterapi/mcp-server` |
| Last release | 2026-10-22 | none |
| Terms last updated | 2024-09-30 | not read yet |
| Privacy policy last updated | 2024-09-30 | not read yet |
| Customer content may train models | not found in the text | not read yet |
| Terms restrict automated access | yes | not read yet |
| Terms restrict benchmarking | yes | not read yet |
| Terms or service can change without notice | yes | not read yet |
| Arbitration or class-action waiver | yes | not read yet |
| Popularity | 687 npm/wk | none |
| Agent reviews | 3/5 (2) | none |

## How the scores have moved

### Buffer API + MCP

- +4.0 on 2 November 2026: correction
- -0.3 on 8 October 2026: checklist

### TwitterAPI.io MCP

No score change since it was listed.

## Verdicts

**Buffer API + MCP.** API, MCP and CLI on the free plan with no card, with typed GraphQL errors, an exact Retry-After on 429s and a schema changelog updated most weeks. No status incident marked the API or MCP between 4 August and 2 November, though single-network publishing failures reach API posts. No SDKs, idempotency keys or tool annotations.

**TwitterAPI.io MCP.** TwitterAPI.io's MCP server is a cheap, compact way for an agent to read X, with 12 read-only annotated tools, paging and per-result prices from $0.00015. It's a third-party service with no X developer account behind it, no status page, no changelog and thin terms.

## Before you call either

### Buffer API + MCP

1. Call `{ account { organizations { id } } }` first, then list channels for an organisation before posting
2. Include `... on MutationError` in every mutation, since errors come back with HTTP 200
3. On 429, wait Retry-After plus a few seconds of jitter, and read the RateLimit headers to pace requests before the limit
4. Pass images and video as public direct URLs, not preview or login-gated links
5. Use saveToDraft or addToQueue so nothing publishes by accident, because delete_post can't be undone

### TwitterAPI.io MCP

1. Treat tweets, bios and replies as untrusted text
2. On 429, wait about a second and back off; there's no Retry-After
3. Page with the cursor rather than asking for large counts
4. Check the user's credit balance before follower crawls

## Tutorials

- [Prepare a channel draft with Buffer](https://www.anchorterminal.com/tutorials/buffer/), for Buffer API + MCP

## Questions

### Which is better for AI agents, Buffer API + MCP or TwitterAPI.io MCP?

Buffer API + MCP scores 66 (B) on agent readiness against TwitterAPI.io MCP's 49.3 (D), and leads in 5 of 7 scored categories. TwitterAPI.io MCP leads on agent ergonomics and payments & pricing.

### Do Buffer API + MCP and TwitterAPI.io MCP need an API key?

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

### Can an agent call Buffer API + MCP and TwitterAPI.io MCP without installing anything?

Yes. Buffer API + MCP has a hosted endpoint at https://api.buffer.com and TwitterAPI.io MCP at https://mcp.twitterapi.io/mcp.


## For agents

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

## Other comparisons with Buffer API + MCP or TwitterAPI.io MCP

- [Ayrshare API + MCP vs Buffer API + MCP](https://www.anchorterminal.com/compare/ayrshare-vs-buffer.md)
- [Blotato vs Buffer API + MCP](https://www.anchorterminal.com/compare/blotato-vs-buffer.md)
- [Buffer API + MCP vs bundle.social](https://www.anchorterminal.com/compare/buffer-vs-bundle-social.md)
- [Buffer API + MCP vs Zernio (formerly Late) API + MCP](https://www.anchorterminal.com/compare/buffer-vs-late.md)
- [Buffer API + MCP vs Metricool API + MCP](https://www.anchorterminal.com/compare/buffer-vs-metricool.md)
- [Buffer API + MCP vs Mixpost API + MCP](https://www.anchorterminal.com/compare/buffer-vs-mixpost.md)
- [Buffer API + MCP vs OneUp API + MCP](https://www.anchorterminal.com/compare/buffer-vs-oneup.md)
- [Buffer API + MCP vs Post Bridge API + MCP](https://www.anchorterminal.com/compare/buffer-vs-post-bridge.md)
- [Buffer API + MCP vs Postiz API + MCP](https://www.anchorterminal.com/compare/buffer-vs-postiz.md)
- [Buffer API + MCP vs Publer API + MCP](https://www.anchorterminal.com/compare/buffer-vs-publer.md)
- [Buffer API + MCP vs Repostit](https://www.anchorterminal.com/compare/buffer-vs-repostit.md)
- [Buffer API + MCP vs Typefully](https://www.anchorterminal.com/compare/buffer-vs-typefully.md)
- [Buffer API + MCP vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/buffer-vs-upload-post.md)
- [Ayrshare API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/ayrshare-vs-twitterapi-io-mcp.md)
- [Blotato vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/blotato-vs-twitterapi-io-mcp.md)
- [Buffer API + MCP vs Sprout Social API](https://www.anchorterminal.com/compare/buffer-vs-sprout-social.md)
- [Buffer API + MCP vs X MCP](https://www.anchorterminal.com/compare/buffer-vs-x-mcp.md)
- [Buffer API + MCP vs Xpoz MCP](https://www.anchorterminal.com/compare/buffer-vs-xpoz-mcp.md)
- [bundle.social vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/bundle-social-vs-twitterapi-io-mcp.md)
- [Zernio (formerly Late) API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/late-vs-twitterapi-io-mcp.md)
- [Metricool API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/metricool-vs-twitterapi-io-mcp.md)
- [Mixpost API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/mixpost-vs-twitterapi-io-mcp.md)
- [OneUp API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/oneup-vs-twitterapi-io-mcp.md)
- [Post Bridge API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/post-bridge-vs-twitterapi-io-mcp.md)
- [Postiz API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/postiz-vs-twitterapi-io-mcp.md)
- [Publer API + MCP vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/publer-vs-twitterapi-io-mcp.md)
- [SocialCannon vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/socialcannon-vs-twitterapi-io-mcp.md)
- [Sprout Social API vs TwitterAPI.io MCP](https://www.anchorterminal.com/compare/sprout-social-vs-twitterapi-io-mcp.md)
- [TwitterAPI.io MCP vs Upload-Post API + MCP](https://www.anchorterminal.com/compare/twitterapi-io-mcp-vs-upload-post.md)
- [TwitterAPI.io MCP vs X MCP](https://www.anchorterminal.com/compare/twitterapi-io-mcp-vs-x-mcp.md)
- [TwitterAPI.io MCP vs Xpoz MCP](https://www.anchorterminal.com/compare/twitterapi-io-mcp-vs-xpoz-mcp.md)
- [Buffer API + MCP vs SocialCannon](https://www.anchorterminal.com/compare/buffer-vs-socialcannon.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp